2151975607 has 4 divisors (see below), whose sum is σ = 2165682616. Its totient is φ = 2138268600.

The previous prime is 2151975593. The next prime is 2151975641. The reversal of 2151975607 is 7065791512.

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 2151975607 - 2²³ = 2143586999 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 (2151975677) 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, 6853269 + ... + 6853582.

It is an arithmetic number, because the mean of its divisors is an integer number (541420654).

Almost surely, 2^2151975607 is an apocalyptic number.

2151975607 is a deficient number, since it is larger than the sum of its proper divisors (13707009).

2151975607 is a wasteful number, since it uses less digits than its factorization.

2151975607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13707008.

The product of its (nonzero) digits is 132300, while the sum is 43.

The square root of 2151975607 is about 46389.3911040014. The cubic root of 2151975607 is about 1291.0580840871.

The spelling of 2151975607 in words is "two billion, one hundred fifty-one million, nine hundred seventy-five thousand, six hundred seven".