215608931242384 has 45 divisors (see below), whose sum is σ = 432647350153473. Its totient is φ = 104086247971776.

The previous prime is 215608931242357. The next prime is 215608931242399. The reversal of 215608931242384 is 483242139806512.

The square root of 215608931242384 is 14683628.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 113060093552784 + 102548837689600 = 10632972^2 + 10126640^2 .

It is a super-2 number, since 2×215608931242384² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1703237557 + ... + 1703364139.

Almost surely, 2^{215608931242384} is an apocalyptic number.

215608931242384 is the 14683628-th square number.

It is an amenable number.

215608931242384 is an abundant number, since it is smaller than the sum of its proper divisors (217038418911089).

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

215608931242384 is an frugal number, since it uses more digits than its factorization.

215608931242384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253232 (or 126614 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 58.

The spelling of 215608931242384 in words is "two hundred fifteen trillion, six hundred eight billion, nine hundred thirty-one million, two hundred forty-two thousand, three hundred eighty-four".