12553515531 has 6 divisors (see below), whose sum is σ = 18132855780. Its totient is φ = 8369010348.

The previous prime is 12553515523. The next prime is 12553515539. The reversal of 12553515531 is 13551535521.

12553515531 is a `hidden beast` number, since 1 + 2 + 5 + 53 + 51 + 553 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (12553515523) and next prime (12553515539).

It is not a de Polignac number, because 12553515531 - 2³ = 12553515523 is a prime.

It is a super-2 number, since 2×12553515531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12553515539) 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, 697417521 + ... + 697417538.

It is an arithmetic number, because the mean of its divisors is an integer number (3022142630).

Almost surely, 2^12553515531 is an apocalyptic number.

12553515531 is a deficient number, since it is larger than the sum of its proper divisors (5579340249).

12553515531 is a wasteful number, since it uses less digits than its factorization.

12553515531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394835065 (or 1394835062 counting only the distinct ones).

The product of its digits is 56250, while the sum is 36.

The spelling of 12553515531 in words is "twelve billion, five hundred fifty-three million, five hundred fifteen thousand, five hundred thirty-one".