538725997531 has 2 divisors, whose sum is σ = 538725997532. Its totient is φ = 538725997530.

The previous prime is 538725997519. The next prime is 538725997541. The reversal of 538725997531 is 135799527835.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 538725997531 - 2³¹ = 536578513883 is a prime.

It is a super-2 number, since 2×538725997531² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (538725997501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269362998765 + 269362998766.

It is an arithmetic number, because the mean of its divisors is an integer number (269362998766).

Almost surely, 2^538725997531 is an apocalyptic number.

538725997531 is a deficient number, since it is larger than the sum of its proper divisors (1).

538725997531 is an equidigital number, since it uses as much as digits as its factorization.

538725997531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71442000, while the sum is 64.

The spelling of 538725997531 in words is "five hundred thirty-eight billion, seven hundred twenty-five million, nine hundred ninety-seven thousand, five hundred thirty-one".