212312013 has 4 divisors (see below), whose sum is σ = 283082688. Its totient is φ = 141541340.

The previous prime is 212312003. The next prime is 212312017. The reversal of 212312013 is 310213212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212312013 - 2¹³ = 212303821 is a prime.

It is a super-2 number, since 2×212312013² = 90152781728224338, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212311983 and 212312001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212312017) 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, 35385333 + ... + 35385338.

It is an arithmetic number, because the mean of its divisors is an integer number (70770672).

Almost surely, 2^212312013 is an apocalyptic number.

It is an amenable number.

212312013 is a deficient number, since it is larger than the sum of its proper divisors (70770675).

212312013 is an equidigital number, since it uses as much as digits as its factorization.

212312013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70770674.

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

The square root of 212312013 is about 14570.9304095518. The cubic root of 212312013 is about 596.5655759505.

Adding to 212312013 its reverse (310213212), we get a palindrome (522525225).

The spelling of 212312013 in words is "two hundred twelve million, three hundred twelve thousand, thirteen".