531505052 has 48 divisors (see below), whose sum is σ = 1016652000. Its totient is φ = 241678080.

The previous prime is 531505027. The next prime is 531505061. The reversal of 531505052 is 250505135.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1402199 + ... + 1402577.

It is an arithmetic number, because the mean of its divisors is an integer number (21180250).

Almost surely, 2^531505052 is an apocalyptic number.

531505052 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

531505052 is the 18824-th pentagonal number.

It is an amenable number.

531505052 is a deficient number, since it is larger than the sum of its proper divisors (485146948).

531505052 is a wasteful number, since it uses less digits than its factorization.

531505052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 531505052 is about 23054.3933340264. The cubic root of 531505052 is about 810.0325404800.

The spelling of 531505052 in words is "five hundred thirty-one million, five hundred five thousand, fifty-two".