402143231000 has 128 divisors (see below), whose sum is σ = 1075734466560. Its totient is φ = 137840688000.

The previous prime is 402143230997. The next prime is 402143231011. The reversal of 402143231000 is 132341204.

It is a super-2 number, since 2×402143231000² (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 an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 44172449 + ... + 44181551.

It is an arithmetic number, because the mean of its divisors is an integer number (8404175520).

Almost surely, 2^402143231000 is an apocalyptic number.

402143231000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402143231000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (537867233280).

402143231000 is an abundant number, since it is smaller than the sum of its proper divisors (673591235560).

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

402143231000 is a wasteful number, since it uses less digits than its factorization.

402143231000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15442 (or 15428 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 402143231000 its reverse (132341204), we get a palindrome (402275572204).

The spelling of 402143231000 in words is "four hundred two billion, one hundred forty-three million, two hundred thirty-one thousand".