2157176117 has 4 divisors (see below), whose sum is σ = 2157422496. Its totient is φ = 2156929740.

The previous prime is 2157176101. The next prime is 2157176129. The reversal of 2157176117 is 7116717512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2157176117 - 2⁴ = 2157176101 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 (2157172117) 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, 109553 + ... + 127734.

It is an arithmetic number, because the mean of its divisors is an integer number (539355624).

Almost surely, 2^2157176117 is an apocalyptic number.

It is an amenable number.

2157176117 is a deficient number, since it is larger than the sum of its proper divisors (246379).

2157176117 is an equidigital number, since it uses as much as digits as its factorization.

2157176117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246378.

The product of its digits is 20580, while the sum is 38.

The square root of 2157176117 is about 46445.4100746242. The cubic root of 2157176117 is about 1292.0972469192.

The spelling of 2157176117 in words is "two billion, one hundred fifty-seven million, one hundred seventy-six thousand, one hundred seventeen".