215285456 has 10 divisors (see below), whose sum is σ = 417115602. Its totient is φ = 107642720.

The previous prime is 215285443. The next prime is 215285519. The reversal of 215285456 is 654582512.

It can be written as a sum of positive squares in only one way, i.e., 190881856 + 24403600 = 13816^2 + 4940^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6727655 + ... + 6727686.

Almost surely, 2^215285456 is an apocalyptic number.

It is an amenable number.

215285456 is a deficient number, since it is larger than the sum of its proper divisors (201830146).

215285456 is a wasteful number, since it uses less digits than its factorization.

215285456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13455349 (or 13455343 counting only the distinct ones).

The product of its digits is 96000, while the sum is 38.

The square root of 215285456 is about 14672.6090386134. The cubic root of 215285456 is about 599.3376542845.

The spelling of 215285456 in words is "two hundred fifteen million, two hundred eighty-five thousand, four hundred fifty-six".