213131332 has 12 divisors (see below), whose sum is σ = 373082220. Its totient is φ = 106536416.

The previous prime is 213131327. The next prime is 213131333. The reversal of 213131332 is 233131312.

It can be written as a sum of positive squares in 2 ways, for example, as 73513476 + 139617856 = 8574^2 + 11816^2 .

It is not an unprimeable number, because it can be changed into a prime (213131333) 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, 23598 + ... + 31354.

It is an arithmetic number, because the mean of its divisors is an integer number (31090185).

Almost surely, 2^213131332 is an apocalyptic number.

It is an amenable number.

213131332 is a deficient number, since it is larger than the sum of its proper divisors (159950888).

213131332 is a wasteful number, since it uses less digits than its factorization.

213131332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14630 (or 14628 counting only the distinct ones).

The product of its digits is 324, while the sum is 19.

The square root of 213131332 is about 14599.0181861658. The cubic root of 213131332 is about 597.3319796231.

Adding to 213131332 its reverse (233131312), we get a palindrome (446262644).

The spelling of 213131332 in words is "two hundred thirteen million, one hundred thirty-one thousand, three hundred thirty-two".