213515012 has 12 divisors (see below), whose sum is σ = 383750220. Its totient is φ = 103872096.

The previous prime is 213514993. The next prime is 213515017. The reversal of 213515012 is 210515312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 194714116 + 18800896 = 13954^2 + 4336^2 .

It is not an unprimeable number, because it can be changed into a prime (213515017) 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, 721187 + ... + 721482.

It is an arithmetic number, because the mean of its divisors is an integer number (31979185).

Almost surely, 2^213515012 is an apocalyptic number.

It is an amenable number.

213515012 is a deficient number, since it is larger than the sum of its proper divisors (170235208).

213515012 is a wasteful number, since it uses less digits than its factorization.

213515012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442710 (or 1442708 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 213515012 is about 14612.1528872374. The cubic root of 213515012 is about 597.6902046714.

Adding to 213515012 its product of nonzero digits (300), we get a palindrome (213515312).

The spelling of 213515012 in words is "two hundred thirteen million, five hundred fifteen thousand, twelve".