511161253531 has 2 divisors, whose sum is σ = 511161253532. Its totient is φ = 511161253530.

The previous prime is 511161253523. The next prime is 511161253583. The reversal of 511161253531 is 135352161115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 511161253531 - 2³ = 511161253523 is a prime.

It is a super-2 number, since 2×511161253531² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (511161253231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255580626765 + 255580626766.

It is an arithmetic number, because the mean of its divisors is an integer number (255580626766).

Almost surely, 2^511161253531 is an apocalyptic number.

511161253531 is a deficient number, since it is larger than the sum of its proper divisors (1).

511161253531 is an equidigital number, since it uses as much as digits as its factorization.

511161253531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13500, while the sum is 34.

The spelling of 511161253531 in words is "five hundred eleven billion, one hundred sixty-one million, two hundred fifty-three thousand, five hundred thirty-one".