215955456 has 48 divisors (see below), whose sum is σ = 575757000. Its totient is φ = 71983104.

The previous prime is 215955449. The next prime is 215955461. The reversal of 215955456 is 654559512.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11431 + ... + 23718.

Almost surely, 2^215955456 is an apocalyptic number.

It is an amenable number.

215955456 is an abundant number, since it is smaller than the sum of its proper divisors (359801544).

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

215955456 is an equidigital number, since it uses as much as digits as its factorization.

215955456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35174 (or 35154 counting only the distinct ones).

The product of its digits is 270000, while the sum is 42.

The square root of 215955456 is about 14695.4229609086. The cubic root of 215955456 is about 599.9587527201.

The spelling of 215955456 in words is "two hundred fifteen million, nine hundred fifty-five thousand, four hundred fifty-six".