231420402000 has 200 divisors, whose sum is σ = 835908219432. Its totient is φ = 61712064000.

The previous prime is 231420401999. The next prime is 231420402001. The reversal of 231420402000 is 204024132.

231420402000 is a `hidden beast` number, since 2 + 3 + 1 + 420 + 40 + 200 + 0 = 666.

231420402000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231420401999) and next prime (231420402001).

It can be written as a sum of positive squares in 4 ways, for example, as 25079156496 + 206341245504 = 158364^2 + 454248^2 .

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231420402001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 552261 + ... + 876260.

Almost surely, 2^231420402000 is an apocalyptic number.

231420402000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231420402000 is an abundant number, since it is smaller than the sum of its proper divisors (604487817432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231420402000 is a wasteful number, since it uses less digits than its factorization.

231420402000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428556 (or 1428531 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 231420402000 its reverse (204024132), we get a palindrome (231624426132).

The spelling of 231420402000 in words is "two hundred thirty-one billion, four hundred twenty million, four hundred two thousand".