531147081 has 16 divisors (see below), whose sum is σ = 716728320. Its totient is φ = 349850880.

The previous prime is 531147061. The next prime is 531147083. The reversal of 531147081 is 180741135.

It is not a de Polignac number, because 531147081 - 2⁵ = 531147049 is a prime.

It is a super-2 number, since 2×531147081² = 564234443309641122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (531147083) 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, 123121 + ... + 127361.

It is an arithmetic number, because the mean of its divisors is an integer number (44795520).

Almost surely, 2^531147081 is an apocalyptic number.

It is an amenable number.

531147081 is a deficient number, since it is larger than the sum of its proper divisors (185581239).

531147081 is a wasteful number, since it uses less digits than its factorization.

531147081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4736.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 531147081 is about 23046.6284085113. The cubic root of 531147081 is about 809.8506461405.

The spelling of 531147081 in words is "five hundred thirty-one million, one hundred forty-seven thousand, eighty-one".