11315530551 has 32 divisors (see below), whose sum is σ = 16376409280. Its totient is φ = 6908488704.

The previous prime is 11315530537. The next prime is 11315530559. The reversal of 11315530551 is 15503551311.

It is not a de Polignac number, because 11315530551 - 2⁶ = 11315530487 is a prime.

It is a super-2 number, since 2×11315530551² (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 (11315530559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6324165 + ... + 6325953.

It is an arithmetic number, because the mean of its divisors is an integer number (511762790).

Almost surely, 2^11315530551 is an apocalyptic number.

11315530551 is a deficient number, since it is larger than the sum of its proper divisors (5060878729).

11315530551 is a wasteful number, since it uses less digits than its factorization.

11315530551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2995.

The product of its (nonzero) digits is 5625, while the sum is 30.

The spelling of 11315530551 in words is "eleven billion, three hundred fifteen million, five hundred thirty thousand, five hundred fifty-one".