655315015 has 4 divisors (see below), whose sum is σ = 786378024. Its totient is φ = 524252008.

The previous prime is 655314991. The next prime is 655315021. The reversal of 655315015 is 510513556.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 655315015 - 2¹⁹ = 654790727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65531497 + ... + 65531506.

It is an arithmetic number, because the mean of its divisors is an integer number (196594506).

Almost surely, 2^655315015 is an apocalyptic number.

655315015 is a deficient number, since it is larger than the sum of its proper divisors (131063009).

655315015 is a wasteful number, since it uses less digits than its factorization.

655315015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131063008.

The product of its (nonzero) digits is 11250, while the sum is 31.

The square root of 655315015 is about 25599.1213716409. The cubic root of 655315015 is about 868.5937624942.

The spelling of 655315015 in words is "six hundred fifty-five million, three hundred fifteen thousand, fifteen".