402155215252 has 12 divisors (see below), whose sum is σ = 804310430560. Its totient is φ = 172352235096.

The previous prime is 402155215247. The next prime is 402155215289. The reversal of 402155215252 is 252512551204.

402155215252 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7181343102 + ... + 7181343157.

Almost surely, 2^402155215252 is an apocalyptic number.

It is an amenable number.

402155215252 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

402155215252 is a wasteful number, since it uses less digits than its factorization.

402155215252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14362686270 (or 14362686268 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 34.

Adding to 402155215252 its reverse (252512551204), we get a palindrome (654667766456).

The spelling of 402155215252 in words is "four hundred two billion, one hundred fifty-five million, two hundred fifteen thousand, two hundred fifty-two".