2115387306381 has 48 divisors (see below), whose sum is σ = 2965141760000. Its totient is φ = 1341340187616.

The previous prime is 2115387306377. The next prime is 2115387306397. The reversal of 2115387306381 is 1836037835112.

It is not a de Polignac number, because 2115387306381 - 2² = 2115387306377 is a prime.

It is a super-2 number, since 2×2115387306381² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2115387306381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115387306311) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 224106660 + ... + 224116098.

Almost surely, 2^{2115387306381} is an apocalyptic number.

It is an amenable number.

2115387306381 is a deficient number, since it is larger than the sum of its proper divisors (849754453619).

2115387306381 is a wasteful number, since it uses less digits than its factorization.

2115387306381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10270 (or 10247 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 2115387306381 in words is "two trillion, one hundred fifteen billion, three hundred eighty-seven million, three hundred six thousand, three hundred eighty-one".