2311561125 has 128 divisors (see below), whose sum is σ = 4455959040. Its totient is φ = 1181433600.

The previous prime is 2311561121. The next prime is 2311561139. The reversal of 2311561125 is 5211651132.

2311561125 is a `hidden beast` number, since 2 + 31 + 15 + 611 + 2 + 5 = 666.

It is not a de Polignac number, because 2311561125 - 2² = 2311561121 is a prime.

It is a super-2 number, since 2×2311561125² = 10686629669222531250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311561121) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 13361539 + ... + 13361711.

It is an arithmetic number, because the mean of its divisors is an integer number (34812180).

Almost surely, 2^2311561125 is an apocalyptic number.

2311561125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2311561125 is a deficient number, since it is larger than the sum of its proper divisors (2144397915).

2311561125 is a wasteful number, since it uses less digits than its factorization.

2311561125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 325 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 2311561125 is about 48078.6972057272. The cubic root of 2311561125 is about 1322.2141300797.

The spelling of 2311561125 in words is "two billion, three hundred eleven million, five hundred sixty-one thousand, one hundred twenty-five".