655477531 has 2 divisors, whose sum is σ = 655477532. Its totient is φ = 655477530.

The previous prime is 655477489. The next prime is 655477567. The reversal of 655477531 is 135774556.

655477531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 655477531 - 2⁹ = 655477019 is a prime.

It is a super-2 number, since 2×655477531² = 859301587291711922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (655477591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327738765 + 327738766.

It is an arithmetic number, because the mean of its divisors is an integer number (327738766).

Almost surely, 2^655477531 is an apocalyptic number.

655477531 is a deficient number, since it is larger than the sum of its proper divisors (1).

655477531 is an equidigital number, since it uses as much as digits as its factorization.

655477531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 441000, while the sum is 43.

The square root of 655477531 is about 25602.2954244341. The cubic root of 655477531 is about 868.6655593721.

The spelling of 655477531 in words is "six hundred fifty-five million, four hundred seventy-seven thousand, five hundred thirty-one".