215256402 has 24 divisors (see below), whose sum is σ = 486667584. Its totient is φ = 68632344.

The previous prime is 215256383. The next prime is 215256403. The reversal of 215256402 is 204652512.

215256402 is a `hidden beast` number, since 2 + 1 + 5 + 256 + 402 = 666.

It is not an unprimeable number, because it can be changed into a prime (215256403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 259558 + ... + 260385.

It is an arithmetic number, because the mean of its divisors is an integer number (20277816).

Almost surely, 2^215256402 is an apocalyptic number.

215256402 is an abundant number, since it is smaller than the sum of its proper divisors (271411182).

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

215256402 is a wasteful number, since it uses less digits than its factorization.

215256402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519974 (or 519971 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 215256402 is about 14671.6189290753. The cubic root of 215256402 is about 599.3106917268.

The spelling of 215256402 in words is "two hundred fifteen million, two hundred fifty-six thousand, four hundred two".