472047221891 has 16 divisors (see below), whose sum is σ = 549161192448. Its totient is φ = 397396255200.

The previous prime is 472047221887. The next prime is 472047221929. The reversal of 472047221891 is 198122740274.

It is not a de Polignac number, because 472047221891 - 2² = 472047221887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (472047241891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1674980 + ... + 1936401.

It is an arithmetic number, because the mean of its divisors is an integer number (34322574528).

Almost surely, 2^472047221891 is an apocalyptic number.

472047221891 is a deficient number, since it is larger than the sum of its proper divisors (77113970557).

472047221891 is a wasteful number, since it uses less digits than its factorization.

472047221891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3611722.

The product of its (nonzero) digits is 451584, while the sum is 47.

The spelling of 472047221891 in words is "four hundred seventy-two billion, forty-seven million, two hundred twenty-one thousand, eight hundred ninety-one".