531216536 has 8 divisors (see below), whose sum is σ = 996031020. Its totient is φ = 265608264.

The previous prime is 531216463. The next prime is 531216557. The reversal of 531216536 is 635612135.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33201026 + ... + 33201041.

Almost surely, 2^531216536 is an apocalyptic number.

It is an amenable number.

531216536 is a deficient number, since it is larger than the sum of its proper divisors (464814484).

531216536 is a wasteful number, since it uses less digits than its factorization.

531216536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66402073 (or 66402069 counting only the distinct ones).

The product of its digits is 16200, while the sum is 32.

The square root of 531216536 is about 23048.1351957159. The cubic root of 531216536 is about 809.8859444142.

The spelling of 531216536 in words is "five hundred thirty-one million, two hundred sixteen thousand, five hundred thirty-six".