13531132551 has 4 divisors (see below), whose sum is σ = 18041510072. Its totient is φ = 9020755032.

The previous prime is 13531132523. The next prime is 13531132583. The reversal of 13531132551 is 15523113531.

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

It is a de Polignac number, because none of the positive numbers 2^k-13531132551 is a prime.

It is a super-2 number, since 2×13531132551² (a number of 21 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 (13531132151) 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, 2255188756 + ... + 2255188761.

It is an arithmetic number, because the mean of its divisors is an integer number (4510377518).

Almost surely, 2^13531132551 is an apocalyptic number.

13531132551 is a deficient number, since it is larger than the sum of its proper divisors (4510377521).

13531132551 is an equidigital number, since it uses as much as digits as its factorization.

13531132551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4510377520.

The product of its digits is 6750, while the sum is 30.

The spelling of 13531132551 in words is "thirteen billion, five hundred thirty-one million, one hundred thirty-two thousand, five hundred fifty-one".