5131621508239 has 4 divisors (see below), whose sum is σ = 5170794191640. Its totient is φ = 5092448824840.

The previous prime is 5131621508207. The next prime is 5131621508267. The reversal of 5131621508239 is 9328051261315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5131621508239 - 2⁵ = 5131621508207 is a prime.

It is a super-2 number, since 2×5131621508239² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5131621508269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19586341504 + ... + 19586341765.

It is an arithmetic number, because the mean of its divisors is an integer number (1292698547910).

Almost surely, 2^{5131621508239} is an apocalyptic number.

5131621508239 is a deficient number, since it is larger than the sum of its proper divisors (39172683401).

5131621508239 is a wasteful number, since it uses less digits than its factorization.

5131621508239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39172683400.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 5131621508239 in words is "five trillion, one hundred thirty-one billion, six hundred twenty-one million, five hundred eight thousand, two hundred thirty-nine".