13531225551 has 4 divisors (see below), whose sum is σ = 18041634072. Its totient is φ = 9020817032.

The previous prime is 13531225549. The next prime is 13531225559. The reversal of 13531225551 is 15552213531.

It is a happy number.

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 13531225551 - 2¹ = 13531225549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531225559) 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, 2255204256 + ... + 2255204261.

It is an arithmetic number, because the mean of its divisors is an integer number (4510408518).

Almost surely, 2^13531225551 is an apocalyptic number.

13531225551 is a deficient number, since it is larger than the sum of its proper divisors (4510408521).

13531225551 is an equidigital number, since it uses as much as digits as its factorization.

13531225551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4510408520.

The product of its digits is 22500, while the sum is 33.

The spelling of 13531225551 in words is "thirteen billion, five hundred thirty-one million, two hundred twenty-five thousand, five hundred fifty-one".