531618725 has 12 divisors (see below), whose sum is σ = 719135520. Its totient is φ = 386631600.

The previous prime is 531618719. The next prime is 531618743. The reversal of 531618725 is 527816135.

It is not a de Polignac number, because 531618725 - 2⁴ = 531618709 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 966305 + ... + 966854.

It is an arithmetic number, because the mean of its divisors is an integer number (59927960).

Almost surely, 2^531618725 is an apocalyptic number.

531618725 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

531618725 is a deficient number, since it is larger than the sum of its proper divisors (187516795).

531618725 is a wasteful number, since it uses less digits than its factorization.

531618725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1933180 (or 1933175 counting only the distinct ones).

The product of its digits is 50400, while the sum is 38.

The square root of 531618725 is about 23056.8585240921. The cubic root of 531618725 is about 810.0902835909.

The spelling of 531618725 in words is "five hundred thirty-one million, six hundred eighteen thousand, seven hundred twenty-five".