531147557811 has 16 divisors (see below), whose sum is σ = 770224644000. Its totient is φ = 323623795200.

The previous prime is 531147557807. The next prime is 531147557819. The reversal of 531147557811 is 118755741135.

It is not a de Polignac number, because 531147557811 - 2² = 531147557807 is a prime.

It is a super-2 number, since 2×531147557811² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (531147557819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67417686 + ... + 67425563.

It is an arithmetic number, because the mean of its divisors is an integer number (48139040250).

Almost surely, 2^531147557811 is an apocalyptic number.

531147557811 is a deficient number, since it is larger than the sum of its proper divisors (239077086189).

531147557811 is a wasteful number, since it uses less digits than its factorization.

531147557811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134843366.

The product of its digits is 588000, while the sum is 48.

The spelling of 531147557811 in words is "five hundred thirty-one billion, one hundred forty-seven million, five hundred fifty-seven thousand, eight hundred eleven".