213174561 has 16 divisors (see below), whose sum is σ = 286640064. Its totient is φ = 140918784.

The previous prime is 213174553. The next prime is 213174581. The reversal of 213174561 is 165471312.

It is not a de Polignac number, because 213174561 - 2³ = 213174553 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213174541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217705 + ... + 218681.

It is an arithmetic number, because the mean of its divisors is an integer number (17915004).

Almost surely, 2^213174561 is an apocalyptic number.

It is an amenable number.

213174561 is a deficient number, since it is larger than the sum of its proper divisors (73465503).

213174561 is a wasteful number, since it uses less digits than its factorization.

213174561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520.

The product of its digits is 5040, while the sum is 30.

The square root of 213174561 is about 14600.4986558679. The cubic root of 213174561 is about 597.3723621082.

It can be divided in two parts, 21317 and 4561, that added together give a triangular number (25878 = T₂₂₇).

The spelling of 213174561 in words is "two hundred thirteen million, one hundred seventy-four thousand, five hundred sixty-one".