215451402 has 16 divisors (see below), whose sum is σ = 431412480. Its totient is φ = 71732192.

The previous prime is 215451391. The next prime is 215451403. The reversal of 215451402 is 204154512.

215451402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (215451403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15627 + ... + 25982.

It is an arithmetic number, because the mean of its divisors is an integer number (26963280).

Almost surely, 2^215451402 is an apocalyptic number.

215451402 is an abundant number, since it is smaller than the sum of its proper divisors (215961078).

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

215451402 is a wasteful number, since it uses less digits than its factorization.

215451402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42477.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 215451402 is about 14678.2629081237. The cubic root of 215451402 is about 599.4916082403.

The spelling of 215451402 in words is "two hundred fifteen million, four hundred fifty-one thousand, four hundred two".