213212310 has 32 divisors (see below), whose sum is σ = 518192640. Its totient is φ = 56136288.

The previous prime is 213212303. The next prime is 213212339. The reversal of 213212310 is 13212312.

It is a super-2 number, since 2×213212310² = 90918978271072200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 213212310.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42612 + ... + 47351.

It is an arithmetic number, because the mean of its divisors is an integer number (16193520).

Almost surely, 2^213212310 is an apocalyptic number.

213212310 is an abundant number, since it is smaller than the sum of its proper divisors (304980330).

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

213212310 is a wasteful number, since it uses less digits than its factorization.

213212310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90052.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 213212310 is about 14601.7913284638. The cubic root of 213212310 is about 597.4076209719.

Adding to 213212310 its reverse (13212312), we get a palindrome (226424622).

The spelling of 213212310 in words is "two hundred thirteen million, two hundred twelve thousand, three hundred ten".