531135465 has 64 divisors (see below), whose sum is σ = 996642816. Its totient is φ = 236535552.

The previous prime is 531135461. The next prime is 531135499. The reversal of 531135465 is 564531135.

It is not a de Polignac number, because 531135465 - 2² = 531135461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (531135461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 724239 + ... + 724971.

It is an arithmetic number, because the mean of its divisors is an integer number (15572544).

Almost surely, 2^531135465 is an apocalyptic number.

It is an amenable number.

531135465 is a deficient number, since it is larger than the sum of its proper divisors (465507351).

531135465 is a wasteful number, since it uses less digits than its factorization.

531135465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918.

The product of its digits is 27000, while the sum is 33.

The square root of 531135465 is about 23046.3763963014. The cubic root of 531135465 is about 809.8447423811.

The spelling of 531135465 in words is "five hundred thirty-one million, one hundred thirty-five thousand, four hundred sixty-five".