655593131 has 2 divisors, whose sum is σ = 655593132. Its totient is φ = 655593130.

The previous prime is 655593109. The next prime is 655593137. The reversal of 655593131 is 131395556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 655593131 - 2¹⁰ = 655592107 is a prime.

It is a super-2 number, since 2×655593131² = 859604706828766322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (655593137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327796565 + 327796566.

It is an arithmetic number, because the mean of its divisors is an integer number (327796566).

Almost surely, 2^655593131 is an apocalyptic number.

655593131 is a deficient number, since it is larger than the sum of its proper divisors (1).

655593131 is an equidigital number, since it uses as much as digits as its factorization.

655593131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60750, while the sum is 38.

The square root of 655593131 is about 25604.5529349762. The cubic root of 655593131 is about 868.7166223154.

The spelling of 655593131 in words is "six hundred fifty-five million, five hundred ninety-three thousand, one hundred thirty-one".