201564516 has 12 divisors (see below), whose sum is σ = 470317232. Its totient is φ = 67188168.

The previous prime is 201564497. The next prime is 201564533. The reversal of 201564516 is 615465102.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×201564516² = 81256508220628512, which contains 22 as substring.

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, 8398510 + ... + 8398533.

Almost surely, 2^201564516 is an apocalyptic number.

It is an amenable number.

201564516 is an abundant number, since it is smaller than the sum of its proper divisors (268752716).

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

201564516 is a wasteful number, since it uses less digits than its factorization.

201564516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16797050 (or 16797048 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 201564516 is about 14197.3418638842. The cubic root of 201564516 is about 586.3244794847.

The spelling of 201564516 in words is "two hundred one million, five hundred sixty-four thousand, five hundred sixteen".