402155431000 has 128 divisors (see below), whose sum is σ = 960643307520. Its totient is φ = 157542000000.

The previous prime is 402155430967. The next prime is 402155431057. The reversal of 402155431000 is 134551204.

It is a happy number.

It is a super-2 number, since 2×402155431000² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10702245 + ... + 10739755.

It is an arithmetic number, because the mean of its divisors is an integer number (7505025840).

Almost surely, 2^402155431000 is an apocalyptic number.

402155431000 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 402155431000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (480321653760).

402155431000 is an abundant number, since it is smaller than the sum of its proper divisors (558487876520).

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

402155431000 is a wasteful number, since it uses less digits than its factorization.

402155431000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37754 (or 37740 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 402155431000 its reverse (134551204), we get a palindrome (402289982204).

The spelling of 402155431000 in words is "four hundred two billion, one hundred fifty-five million, four hundred thirty-one thousand".