531406536 has 64 divisors (see below), whose sum is σ = 1467849600. Its totient is φ = 159464448.

The previous prime is 531406523. The next prime is 531406571. The reversal of 531406536 is 635604135.

It is a junction number, because it is equal to n+sod(n) for n = 531406497 and 531406506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18931 + ... + 37698.

It is an arithmetic number, because the mean of its divisors is an integer number (22935150).

Almost surely, 2^531406536 is an apocalyptic number.

It is an amenable number.

531406536 is an abundant number, since it is smaller than the sum of its proper divisors (936443064).

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

531406536 is a wasteful number, since it uses less digits than its factorization.

531406536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56678 (or 56674 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 531406536 is about 23052.2566357396. The cubic root of 531406536 is about 809.9824900955.

The spelling of 531406536 in words is "five hundred thirty-one million, four hundred six thousand, five hundred thirty-six".