215554023456 has 48 divisors (see below), whose sum is σ = 566017248384. Its totient is φ = 71827476224.

The previous prime is 215554023407. The next prime is 215554023479. The reversal of 215554023456 is 654320455512.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81171 + ... + 661586.

It is an arithmetic number, because the mean of its divisors is an integer number (11792026008).

Almost surely, 2^215554023456 is an apocalyptic number.

It is an amenable number.

215554023456 is an abundant number, since it is smaller than the sum of its proper divisors (350463224928).

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

215554023456 is a wasteful number, since it uses less digits than its factorization.

215554023456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745793 (or 745785 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 42.

Adding to 215554023456 its reverse (654320455512), we get a palindrome (869874478968).

The spelling of 215554023456 in words is "two hundred fifteen billion, five hundred fifty-four million, twenty-three thousand, four hundred fifty-six".