215064645 has 16 divisors (see below), whose sum is σ = 346218432. Its totient is φ = 113996160.

The previous prime is 215064611. The next prime is 215064659. The reversal of 215064645 is 546460512.

It is a de Polignac number, because none of the positive numbers 2^k-215064645 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41536 + ... + 46425.

It is an arithmetic number, because the mean of its divisors is an integer number (21638652).

Almost surely, 2^215064645 is an apocalyptic number.

It is an amenable number.

215064645 is a deficient number, since it is larger than the sum of its proper divisors (131153787).

215064645 is a wasteful number, since it uses less digits than its factorization.

215064645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88132.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 215064645 is about 14665.0825091440. The cubic root of 215064645 is about 599.1326774122.

It can be divided in two parts, 2150 and 64645, that added together give a triangular number (66795 = T₃₆₅).

The spelling of 215064645 in words is "two hundred fifteen million, sixty-four thousand, six hundred forty-five".