215460431 has 4 divisors (see below), whose sum is σ = 228134592. Its totient is φ = 202786272.

The previous prime is 215460373. The next prime is 215460439. The reversal of 215460431 is 134064512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 215460431 - 2²² = 211266127 is a prime.

It is a super-2 number, since 2×215460431² = 92846394653411522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215460431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215460439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6337055 + ... + 6337088.

It is an arithmetic number, because the mean of its divisors is an integer number (57033648).

Almost surely, 2^215460431 is an apocalyptic number.

215460431 is a deficient number, since it is larger than the sum of its proper divisors (12674161).

215460431 is a wasteful number, since it uses less digits than its factorization.

215460431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12674160.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 215460431 is about 14678.5704685436. The cubic root of 215460431 is about 599.4999824940.

The spelling of 215460431 in words is "two hundred fifteen million, four hundred sixty thousand, four hundred thirty-one".