213161064 has 16 divisors (see below), whose sum is σ = 532902720. Its totient is φ = 71053680.

The previous prime is 213161063. The next prime is 213161083. The reversal of 213161064 is 460161312.

It is a super-2 number, since 2×213161064² = 90875278411224192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 8881711 = 213161064 / (2 + 1 + 3 + 1 + 6 + 1 + 0 + 6 + 4).

It is not an unprimeable number, because it can be changed into a prime (213161063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4440832 + ... + 4440879.

It is an arithmetic number, because the mean of its divisors is an integer number (33306420).

Almost surely, 2^213161064 is an apocalyptic number.

213161064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

213161064 is an abundant number, since it is smaller than the sum of its proper divisors (319741656).

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

213161064 is a wasteful number, since it uses less digits than its factorization.

213161064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8881720 (or 8881716 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 213161064 is about 14600.0364383107. The cubic root of 213161064 is about 597.3597544360.

The spelling of 213161064 in words is "two hundred thirteen million, one hundred sixty-one thousand, sixty-four".