553125321531 has 6 divisors (see below), whose sum is σ = 798958797780. Its totient is φ = 368750214348.

The previous prime is 553125321503. The next prime is 553125321587. The reversal of 553125321531 is 135123521355.

553125321531 is a `hidden beast` number, since 5 + 53 + 1 + 2 + 53 + 21 + 531 = 666.

It is not a de Polignac number, because 553125321531 - 2⁵ = 553125321499 is a prime.

It is a super-2 number, since 2×553125321531² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (553125321631) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 30729184521 + ... + 30729184538.

It is an arithmetic number, because the mean of its divisors is an integer number (133159799630).

Almost surely, 2^553125321531 is an apocalyptic number.

553125321531 is a deficient number, since it is larger than the sum of its proper divisors (245833476249).

553125321531 is a wasteful number, since it uses less digits than its factorization.

553125321531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61458369065 (or 61458369062 counting only the distinct ones).

The product of its digits is 67500, while the sum is 36.

Adding to 553125321531 its reverse (135123521355), we get a palindrome (688248842886).

The spelling of 553125321531 in words is "five hundred fifty-three billion, one hundred twenty-five million, three hundred twenty-one thousand, five hundred thirty-one".