2173722874 has 8 divisors (see below), whose sum is σ = 3267658548. Its totient is φ = 1084503360.

The previous prime is 2173722853. The next prime is 2173722919. The reversal of 2173722874 is 4782273712.

It can be written as a sum of positive squares in 2 ways, for example, as 1939785849 + 233937025 = 44043^2 + 15295^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2173722874² = 9450142265901639752, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2173722874.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1177887 + ... + 1179730.

Almost surely, 2^2173722874 is an apocalyptic number.

2173722874 is a deficient number, since it is larger than the sum of its proper divisors (1093935674).

2173722874 is a wasteful number, since it uses less digits than its factorization.

2173722874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358080.

The product of its digits is 263424, while the sum is 43.

The square root of 2173722874 is about 46623.2010269565. The cubic root of 2173722874 is about 1295.3925404228.

The spelling of 2173722874 in words is "two billion, one hundred seventy-three million, seven hundred twenty-two thousand, eight hundred seventy-four".