213102312 has 32 divisors (see below), whose sum is σ = 538747200. Its totient is φ = 70235264.

The previous prime is 213102289. The next prime is 213102319. The reversal of 213102312 is 213201312.

It is a junction number, because it is equal to n+sod(n) for n = 213102291 and 213102300.

It is not an unprimeable number, because it can be changed into a prime (213102319) 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, 47748 + ... + 52019.

It is an arithmetic number, because the mean of its divisors is an integer number (16835850).

Almost surely, 2^213102312 is an apocalyptic number.

It is an amenable number.

213102312 is an abundant number, since it is smaller than the sum of its proper divisors (325644888).

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

213102312 is a wasteful number, since it uses less digits than its factorization.

213102312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99865 (or 99861 counting only the distinct ones).

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

The square root of 213102312 is about 14598.0242498771. The cubic root of 213102312 is about 597.3048674497.

Adding to 213102312 its reverse (213201312), we get a palindrome (426303624).

The spelling of 213102312 in words is "two hundred thirteen million, one hundred two thousand, three hundred twelve".