115251321511 has 4 divisors (see below), whose sum is σ = 117204733800. Its totient is φ = 113297909224.

The previous prime is 115251321509. The next prime is 115251321527. The reversal of 115251321511 is 115123152511.

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 115251321511 - 2¹ = 115251321509 is a prime.

It is a super-2 number, since 2×115251321511² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115251321511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115251391511) 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, 976706056 + ... + 976706173.

It is an arithmetic number, because the mean of its divisors is an integer number (29301183450).

Almost surely, 2^115251321511 is an apocalyptic number.

115251321511 is a deficient number, since it is larger than the sum of its proper divisors (1953412289).

115251321511 is an equidigital number, since it uses as much as digits as its factorization.

115251321511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953412288.

The product of its digits is 1500, while the sum is 28.

The spelling of 115251321511 in words is "one hundred fifteen billion, two hundred fifty-one million, three hundred twenty-one thousand, five hundred eleven".