213513755 has 24 divisors (see below), whose sum is σ = 317084832. Its totient is φ = 135143424.

The previous prime is 213513739. The next prime is 213513763. The reversal of 213513755 is 557315312.

It is not a de Polignac number, because 213513755 - 2⁴ = 213513739 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12134 + ... + 23963.

It is an arithmetic number, because the mean of its divisors is an integer number (13211868).

Almost surely, 2^213513755 is an apocalyptic number.

213513755 is a deficient number, since it is larger than the sum of its proper divisors (103571077).

213513755 is a wasteful number, since it uses less digits than its factorization.

213513755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36135 (or 36122 counting only the distinct ones).

The product of its digits is 15750, while the sum is 32.

The square root of 213513755 is about 14612.1098750317. The cubic root of 213513755 is about 597.6890317670.

The spelling of 213513755 in words is "two hundred thirteen million, five hundred thirteen thousand, seven hundred fifty-five".