513431655 has 32 divisors (see below), whose sum is σ = 906266880. Its totient is φ = 246132480.

The previous prime is 513431651. The next prime is 513431669. The reversal of 513431655 is 556134315.

It is not a de Polignac number, because 513431655 - 2² = 513431651 is a prime.

It is a super-2 number, since 2×513431655² = 527224128712078050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513431651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2797 + ... + 32166.

It is an arithmetic number, because the mean of its divisors is an integer number (28320840).

Almost surely, 2^513431655 is an apocalyptic number.

513431655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

513431655 is a deficient number, since it is larger than the sum of its proper divisors (392835225).

513431655 is a wasteful number, since it uses less digits than its factorization.

513431655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35071.

The product of its digits is 27000, while the sum is 33.

The square root of 513431655 is about 22659.0303190582. The cubic root of 513431655 is about 800.7449597243.

The spelling of 513431655 in words is "five hundred thirteen million, four hundred thirty-one thousand, six hundred fifty-five".