2310625665721 has 4 divisors (see below), whose sum is σ = 2322354730212. Its totient is φ = 2298896601232.

The previous prime is 2310625665643. The next prime is 2310625665779. The reversal of 2310625665721 is 1275665260132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2084734587321 + 225891078400 = 1443861^2 + 475280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2310625665721 is a prime.

It is a super-2 number, since 2×2310625665721² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2310625668721) 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, 5864531950 + ... + 5864532343.

It is an arithmetic number, because the mean of its divisors is an integer number (580588682553).

Almost surely, 2^{2310625665721} is an apocalyptic number.

It is an amenable number.

2310625665721 is a deficient number, since it is larger than the sum of its proper divisors (11729064491).

2310625665721 is a wasteful number, since it uses less digits than its factorization.

2310625665721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11729064490.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 2310625665721 in words is "two trillion, three hundred ten billion, six hundred twenty-five million, six hundred sixty-five thousand, seven hundred twenty-one".