213012515 has 16 divisors (see below), whose sum is σ = 276345120. Its totient is φ = 157075200.

The previous prime is 213012509. The next prime is 213012521. The reversal of 213012515 is 515210312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (213012509) and next prime (213012521).

It is not a de Polignac number, because 213012515 - 2⁶ = 213012451 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26786 + ... + 33815.

It is an arithmetic number, because the mean of its divisors is an integer number (17271570).

Almost surely, 2^213012515 is an apocalyptic number.

213012515 is a deficient number, since it is larger than the sum of its proper divisors (63332605).

213012515 is a wasteful number, since it uses less digits than its factorization.

213012515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60662.

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

The square root of 213012515 is about 14594.9482698638. The cubic root of 213012515 is about 597.2209582699.

Adding to 213012515 its reverse (515210312), we get a palindrome (728222827).

The spelling of 213012515 in words is "two hundred thirteen million, twelve thousand, five hundred fifteen".