655113521 has 16 divisors (see below), whose sum is σ = 711244800. Its totient is φ = 601448400.

The previous prime is 655113517. The next prime is 655113523. The reversal of 655113521 is 125311556.

It is a cyclic number.

It is not a de Polignac number, because 655113521 - 2² = 655113517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655113523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75476 + ... + 83706.

It is an arithmetic number, because the mean of its divisors is an integer number (44452800).

Almost surely, 2^655113521 is an apocalyptic number.

It is an amenable number.

655113521 is a deficient number, since it is larger than the sum of its proper divisors (56131279).

655113521 is a wasteful number, since it uses less digits than its factorization.

655113521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8380.

The product of its digits is 4500, while the sum is 29.

The square root of 655113521 is about 25595.1855043092. The cubic root of 655113521 is about 868.5047292972.

The spelling of 655113521 in words is "six hundred fifty-five million, one hundred thirteen thousand, five hundred twenty-one".