516521655 has 24 divisors (see below), whose sum is σ = 964174848. Its totient is φ = 254287296.

The previous prime is 516521653. The next prime is 516521683. The reversal of 516521655 is 556125615.

It is not a de Polignac number, because 516521655 - 2¹ = 516521653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516521651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 440887 + ... + 442056.

It is an arithmetic number, because the mean of its divisors is an integer number (40173952).

Almost surely, 2^516521655 is an apocalyptic number.

516521655 is a deficient number, since it is larger than the sum of its proper divisors (447653193).

516521655 is a wasteful number, since it uses less digits than its factorization.

516521655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882967 (or 882964 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

The square root of 516521655 is about 22727.1127730735. The cubic root of 516521655 is about 802.3481297609.

The spelling of 516521655 in words is "five hundred sixteen million, five hundred twenty-one thousand, six hundred fifty-five".