402031015251 has 8 divisors (see below), whose sum is σ = 536713930704. Its totient is φ = 267684388320.

The previous prime is 402031015231. The next prime is 402031015259. The reversal of 402031015251 is 152510130204.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 402031015251 - 2¹⁴ = 402030998867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402031015259) 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, 84069340 + ... + 84074121.

It is an arithmetic number, because the mean of its divisors is an integer number (67089241338).

Almost surely, 2^402031015251 is an apocalyptic number.

402031015251 is a deficient number, since it is larger than the sum of its proper divisors (134682915453).

402031015251 is a wasteful number, since it uses less digits than its factorization.

402031015251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168144261.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 402031015251 its reverse (152510130204), we get a palindrome (554541145455).

The spelling of 402031015251 in words is "four hundred two billion, thirty-one million, fifteen thousand, two hundred fifty-one".