213661360 has 40 divisors (see below), whose sum is σ = 541925136. Its totient is φ = 77694720.

The previous prime is 213661333. The next prime is 213661379. The reversal of 213661360 is 63166312.

213661360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

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, 120519 + ... + 122278.

Almost surely, 2^213661360 is an apocalyptic number.

213661360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213661360 is an abundant number, since it is smaller than the sum of its proper divisors (328263776).

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

213661360 is a wasteful number, since it uses less digits than its factorization.

213661360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242821 (or 242815 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 213661360 is about 14617.1597788353. The cubic root of 213661360 is about 597.8267302612.

The spelling of 213661360 in words is "two hundred thirteen million, six hundred sixty-one thousand, three hundred sixty".