215542664 has 16 divisors (see below), whose sum is σ = 404643600. Its totient is φ = 107637712.

The previous prime is 215542661. The next prime is 215542687. The reversal of 215542664 is 466245512.

215542664 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 (215542661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9674 + ... + 22905.

It is an arithmetic number, because the mean of its divisors is an integer number (25290225).

Almost surely, 2^215542664 is an apocalyptic number.

It is an amenable number.

215542664 is a deficient number, since it is larger than the sum of its proper divisors (189100936).

215542664 is a wasteful number, since it uses less digits than its factorization.

215542664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33412 (or 33408 counting only the distinct ones).

The product of its digits is 57600, while the sum is 35.

The square root of 215542664 is about 14681.3713255949. The cubic root of 215542664 is about 599.5762415258.

The spelling of 215542664 in words is "two hundred fifteen million, five hundred forty-two thousand, six hundred sixty-four".