2172267657 has 36 divisors (see below), whose sum is σ = 3654683136. Its totient is φ = 1239703920.

The previous prime is 2172267641. The next prime is 2172267659. The reversal of 2172267657 is 7567622712.

It is not a de Polignac number, because 2172267657 - 2⁴ = 2172267641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2172267659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 399048 + ... + 404454.

It is an arithmetic number, because the mean of its divisors is an integer number (101518976).

Almost surely, 2^2172267657 is an apocalyptic number.

It is an amenable number.

2172267657 is a deficient number, since it is larger than the sum of its proper divisors (1482415479).

2172267657 is a wasteful number, since it uses less digits than its factorization.

2172267657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6338 (or 6328 counting only the distinct ones).

The product of its digits is 493920, while the sum is 45.

The square root of 2172267657 is about 46607.5922677840. The cubic root of 2172267657 is about 1295.1034054268.

The spelling of 2172267657 in words is "two billion, one hundred seventy-two million, two hundred sixty-seven thousand, six hundred fifty-seven".