531561612 has 24 divisors (see below), whose sum is σ = 1256012800. Its totient is φ = 174944016.

The previous prime is 531561599. The next prime is 531561617. The reversal of 531561612 is 216165135.

It is a self number, because there is not a number n which added to its sum of digits gives 531561612.

It is not an unprimeable number, because it can be changed into a prime (531561617) 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 7 ways as a sum of consecutive naturals, for example, 279412 + ... + 281307.

Almost surely, 2^531561612 is an apocalyptic number.

It is an amenable number.

531561612 is an abundant number, since it is smaller than the sum of its proper divisors (724451188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531561612 is a wasteful number, since it uses less digits than its factorization.

531561612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560805 (or 560803 counting only the distinct ones).

The product of its digits is 5400, while the sum is 30.

The square root of 531561612 is about 23055.6199656396. The cubic root of 531561612 is about 810.0612726092.

The spelling of 531561612 in words is "five hundred thirty-one million, five hundred sixty-one thousand, six hundred twelve".