2173722956 has 12 divisors (see below), whose sum is σ = 3935188320. Its totient is φ = 1049383440.

The previous prime is 2173722919. The next prime is 2173722961. The reversal of 2173722956 is 6592273712.

It is a happy number.

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, 9369380 + ... + 9369611.

It is an arithmetic number, because the mean of its divisors is an integer number (327932360).

Almost surely, 2^2173722956 is an apocalyptic number.

It is an amenable number.

2173722956 is a deficient number, since it is larger than the sum of its proper divisors (1761465364).

2173722956 is a wasteful number, since it uses less digits than its factorization.

2173722956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18739024 (or 18739022 counting only the distinct ones).

The product of its digits is 317520, while the sum is 44.

The square root of 2173722956 is about 46623.2019063470. The cubic root of 2173722956 is about 1295.3925567116.

The spelling of 2173722956 in words is "two billion, one hundred seventy-three million, seven hundred twenty-two thousand, nine hundred fifty-six".