213312402 has 24 divisors (see below), whose sum is σ = 462583836. Its totient is φ = 71041536.

The previous prime is 213312401. The next prime is 213312431. The reversal of 213312402 is 204213312.

It can be written as a sum of positive squares in 2 ways, for example, as 213189201 + 123201 = 14601^2 + 351^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (213312401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18778 + ... + 27914.

Almost surely, 2^213312402 is an apocalyptic number.

213312402 is an abundant number, since it is smaller than the sum of its proper divisors (249271434).

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

213312402 is a wasteful number, since it uses less digits than its factorization.

213312402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10442 (or 10439 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 213312402 is about 14605.2183140137. The cubic root of 213312402 is about 597.5010901983.

Adding to 213312402 its reverse (204213312), we get a palindrome (417525714).

It can be divided in two parts, 2133 and 12402, that added together give a triangular number (14535 = T₁₇₀).

The spelling of 213312402 in words is "two hundred thirteen million, three hundred twelve thousand, four hundred two".