215065560 has 64 divisors (see below), whose sum is σ = 679161600. Its totient is φ = 54331776.

The previous prime is 215065553. The next prime is 215065583. The reversal of 215065560 is 65560512.

215065560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×215065560² = 92506390196227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44884 + ... + 49443.

It is an arithmetic number, because the mean of its divisors is an integer number (10611900).

Almost surely, 2^215065560 is an apocalyptic number.

215065560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215065560 is an abundant number, since it is smaller than the sum of its proper divisors (464096040).

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

215065560 is a wasteful number, since it uses less digits than its factorization.

215065560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94360 (or 94356 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 215065560 is about 14665.1137056622. The cubic root of 215065560 is about 599.1335270879.

The spelling of 215065560 in words is "two hundred fifteen million, sixty-five thousand, five hundred sixty".