3213131402 has 16 divisors (see below), whose sum is σ = 5243956872. Its totient is φ = 1467694080.

The previous prime is 3213131399. The next prime is 3213131407. The reversal of 3213131402 is 2041313123.

It can be written as a sum of positive squares in 4 ways, for example, as 2653383121 + 559748281 = 51511^2 + 23659^2 .

It is not an unprimeable number, because it can be changed into a prime (3213131407) 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, 634499 + ... + 639542.

Almost surely, 2^3213131402 is an apocalyptic number.

3213131402 is a deficient number, since it is larger than the sum of its proper divisors (2030825470).

3213131402 is a wasteful number, since it uses less digits than its factorization.

3213131402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274153.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 3213131402 is about 56684.4899597765. The cubic root of 3213131402 is about 1475.6255359990.

Adding to 3213131402 its reverse (2041313123), we get a palindrome (5254444525).

The spelling of 3213131402 in words is "three billion, two hundred thirteen million, one hundred thirty-one thousand, four hundred two".