2115970951 has 4 divisors (see below), whose sum is σ = 2207969712. Its totient is φ = 2023972192.

The previous prime is 2115970939. The next prime is 2115970963. The reversal of 2115970951 is 1590795112.

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

It is an interprime number because it is at equal distance from previous prime (2115970939) and next prime (2115970963).

It is a cyclic number.

It is not a de Polignac number, because 2115970951 - 2¹⁷ = 2115839879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115970651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45999346 + ... + 45999391.

It is an arithmetic number, because the mean of its divisors is an integer number (551992428).

Almost surely, 2^2115970951 is an apocalyptic number.

2115970951 is a deficient number, since it is larger than the sum of its proper divisors (91998761).

2115970951 is an equidigital number, since it uses as much as digits as its factorization.

2115970951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91998760.

The product of its (nonzero) digits is 28350, while the sum is 40.

The square root of 2115970951 is about 45999.6842489163. The cubic root of 2115970951 is about 1283.8173296857.

The spelling of 2115970951 in words is "two billion, one hundred fifteen million, nine hundred seventy thousand, nine hundred fifty-one".