531761220243125 has 80 divisors (see below), whose sum is σ = 716352010228800. Its totient is φ = 393366025728000.

The previous prime is 531761220243109. The next prime is 531761220243229. The reversal of 531761220243125 is 521342022167135.

It is a happy number.

It is not a de Polignac number, because 531761220243125 - 2⁴ = 531761220243109 is a prime.

It is a super-3 number, since 3×531761220243125³ (a number of 45 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 119280506 + ... + 123658244.

It is an arithmetic number, because the mean of its divisors is an integer number (8954400127860).

Almost surely, 2^{531761220243125} is an apocalyptic number.

It is an amenable number.

531761220243125 is a deficient number, since it is larger than the sum of its proper divisors (184590789985675).

531761220243125 is a wasteful number, since it uses less digits than its factorization.

531761220243125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4378024 (or 4378009 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 531761220243125 in words is "five hundred thirty-one trillion, seven hundred sixty-one billion, two hundred twenty million, two hundred forty-three thousand, one hundred twenty-five".