2172397474 has 16 divisors (see below), whose sum is σ = 3510134712. Its totient is φ = 1002394368.

The previous prime is 2172397459. The next prime is 2172397477. The reversal of 2172397474 is 4747932712.

It can be written as a sum of positive squares in 4 ways, for example, as 1501950025 + 670447449 = 38755^2 + 25893^2 .

It is not an unprimeable number, because it can be changed into a prime (2172397477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132472 + ... + 147964.

Almost surely, 2^2172397474 is an apocalyptic number.

2172397474 is a deficient number, since it is larger than the sum of its proper divisors (1337737238).

2172397474 is a wasteful number, since it uses less digits than its factorization.

2172397474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20901.

The product of its digits is 592704, while the sum is 46.

The square root of 2172397474 is about 46608.9849063461. The cubic root of 2172397474 is about 1295.1292038268.

The spelling of 2172397474 in words is "two billion, one hundred seventy-two million, three hundred ninety-seven thousand, four hundred seventy-four".