213211090 has 16 divisors (see below), whose sum is σ = 383949720. Its totient is φ = 85246720.

The previous prime is 213211067. The next prime is 213211099. The reversal of 213211090 is 90112312.

It can be written as a sum of positive squares in 4 ways, for example, as 139783329 + 73427761 = 11823^2 + 8569^2 .

It is not an unprimeable number, because it can be changed into a prime (213211099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34776 + ... + 40444.

Almost surely, 2^213211090 is an apocalyptic number.

213211090 is a deficient number, since it is larger than the sum of its proper divisors (170738630).

213211090 is a wasteful number, since it uses less digits than its factorization.

213211090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9437.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 213211090 is about 14601.7495527077. The cubic root of 213211090 is about 597.4064815150.

The spelling of 213211090 in words is "two hundred thirteen million, two hundred eleven thousand, ninety".