472222161 has 12 divisors (see below), whose sum is σ = 684281988. Its totient is φ = 313807104.

The previous prime is 472222147. The next prime is 472222169. The reversal of 472222161 is 161222274.

It can be written as a sum of positive squares in 2 ways, for example, as 1115136 + 471107025 = 1056^2 + 21705^2 .

It is not a de Polignac number, because 472222161 - 2⁷ = 472222033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (472222169) 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 11 ways as a sum of consecutive naturals, for example, 81000 + ... + 86633.

It is an arithmetic number, because the mean of its divisors is an integer number (57023499).

Almost surely, 2^472222161 is an apocalyptic number.

It is an amenable number.

472222161 is a deficient number, since it is larger than the sum of its proper divisors (212059827).

472222161 is a wasteful number, since it uses less digits than its factorization.

472222161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167952 (or 167949 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 472222161 is about 21730.6732753498. The cubic root of 472222161 is about 778.7214210729.

The spelling of 472222161 in words is "four hundred seventy-two million, two hundred twenty-two thousand, one hundred sixty-one".