531121924 has 6 divisors (see below), whose sum is σ = 929463374. Its totient is φ = 265560960.

The previous prime is 531121901. The next prime is 531121951. The reversal of 531121924 is 429121135.

It can be written as a sum of positive squares in only one way, i.e., 281165824 + 249956100 = 16768^2 + 15810^2 .

It is a junction number, because it is equal to n+sod(n) for n = 531121892 and 531121901.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66390237 + ... + 66390244.

Almost surely, 2^531121924 is an apocalyptic number.

It is an amenable number.

531121924 is a deficient number, since it is larger than the sum of its proper divisors (398341450).

531121924 is a wasteful number, since it uses less digits than its factorization.

531121924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132780485 (or 132780483 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 531121924 is about 23046.0826172259. The cubic root of 531121924 is about 809.8378601439.

The spelling of 531121924 in words is "five hundred thirty-one million, one hundred twenty-one thousand, nine hundred twenty-four".