11311601251 has 4 divisors (see below), whose sum is σ = 11324500192. Its totient is φ = 11298702312.

The previous prime is 11311601243. The next prime is 11311601297. The reversal of 11311601251 is 15210611311.

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 11311601251 - 2³ = 11311601243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11311601201) 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, 6448155 + ... + 6449908.

It is an arithmetic number, because the mean of its divisors is an integer number (2831125048).

Almost surely, 2^11311601251 is an apocalyptic number.

11311601251 is a deficient number, since it is larger than the sum of its proper divisors (12898941).

11311601251 is an equidigital number, since it uses as much as digits as its factorization.

11311601251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12898940.

The product of its (nonzero) digits is 180, while the sum is 22.

The spelling of 11311601251 in words is "eleven billion, three hundred eleven million, six hundred one thousand, two hundred fifty-one".