11513203551 has 12 divisors (see below), whose sum is σ = 17203637880. Its totient is φ = 7410797520.

The previous prime is 11513203529. The next prime is 11513203571. The reversal of 11513203551 is 15530231511.

It is not a de Polignac number, because 11513203551 - 2¹⁰ = 11513202527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11513203571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22055685 + ... + 22056206.

It is an arithmetic number, because the mean of its divisors is an integer number (1433636490).

Almost surely, 2^11513203551 is an apocalyptic number.

11513203551 is a deficient number, since it is larger than the sum of its proper divisors (5690434329).

11513203551 is a wasteful number, since it uses less digits than its factorization.

11513203551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44111926 (or 44111923 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The spelling of 11513203551 in words is "eleven billion, five hundred thirteen million, two hundred three thousand, five hundred fifty-one".