213515345 has 16 divisors (see below), whose sum is σ = 264757248. Its totient is φ = 165176640.

The previous prime is 213515329. The next prime is 213515353. The reversal of 213515345 is 543515312.

It is not a de Polignac number, because 213515345 - 2⁴ = 213515329 is a prime.

It is a Duffinian number.

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, 27440 + ... + 34350.

It is an arithmetic number, because the mean of its divisors is an integer number (16547328).

Almost surely, 2^213515345 is an apocalyptic number.

It is an amenable number.

213515345 is a deficient number, since it is larger than the sum of its proper divisors (51241903).

213515345 is a wasteful number, since it uses less digits than its factorization.

213515345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7120.

The product of its digits is 9000, while the sum is 29.

The square root of 213515345 is about 14612.1642818578. The cubic root of 213515345 is about 597.6905153923.

The spelling of 213515345 in words is "two hundred thirteen million, five hundred fifteen thousand, three hundred forty-five".