231302020340 has 24 divisors (see below), whose sum is σ = 506853123840. Its totient is φ = 88498164128.

The previous prime is 231302020337. The next prime is 231302020343. The reversal of 231302020340 is 43020203132.

It is an interprime number because it is at equal distance from previous prime (231302020337) and next prime (231302020343).

It is a super-2 number, since 2×231302020340² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231302020343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251414780 + ... + 251415699.

It is an arithmetic number, because the mean of its divisors is an integer number (21118880160).

Almost surely, 2^231302020340 is an apocalyptic number.

231302020340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231302020340 is an abundant number, since it is smaller than the sum of its proper divisors (275551103500).

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

231302020340 is a wasteful number, since it uses less digits than its factorization.

231302020340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502830511 (or 502830509 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 231302020340 its reverse (43020203132), we get a palindrome (274322223472).

The spelling of 231302020340 in words is "two hundred thirty-one billion, three hundred two million, twenty thousand, three hundred forty".