2157977174 has 16 divisors (see below), whose sum is σ = 3524828400. Its totient is φ = 986950944.

The previous prime is 2157977153. The next prime is 2157977179. The reversal of 2157977174 is 4717797512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157977179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 978017 + ... + 980220.

It is an arithmetic number, because the mean of its divisors is an integer number (220301775).

Almost surely, 2^2157977174 is an apocalyptic number.

2157977174 is a deficient number, since it is larger than the sum of its proper divisors (1366851226).

2157977174 is a wasteful number, since it uses less digits than its factorization.

2157977174 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958287.

The product of its digits is 864360, while the sum is 50.

The square root of 2157977174 is about 46454.0329142691. The cubic root of 2157977174 is about 1292.2571651634.

The spelling of 2157977174 in words is "two billion, one hundred fifty-seven million, nine hundred seventy-seven thousand, one hundred seventy-four".