213240515 has 16 divisors (see below), whose sum is σ = 271840800. Its totient is φ = 160123392.

The previous prime is 213240497. The next prime is 213240523. The reversal of 213240515 is 515042312.

It is a cyclic number.

It is not a de Polignac number, because 213240515 - 2¹⁰ = 213239491 is a prime.

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, 59 + ... + 20651.

It is an arithmetic number, because the mean of its divisors is an integer number (16990050).

Almost surely, 2^213240515 is an apocalyptic number.

213240515 is a deficient number, since it is larger than the sum of its proper divisors (58600285).

213240515 is a wasteful number, since it uses less digits than its factorization.

213240515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20726.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 213240515 is about 14602.7571026844. The cubic root of 213240515 is about 597.4339626952.

Adding to 213240515 its reverse (515042312), we get a palindrome (728282827).

The spelling of 213240515 in words is "two hundred thirteen million, two hundred forty thousand, five hundred fifteen".