472181816 has 8 divisors (see below), whose sum is σ = 885340920. Its totient is φ = 236090904.

The previous prime is 472181813. The next prime is 472181861. The reversal of 472181816 is 618181274.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×472181816² = 445911334722115712, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a pancake number, because a pancake can be divided into 472181816 parts by 30730 straight cuts.

It is a self number, because there is not a number n which added to its sum of digits gives 472181816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (472181813) 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 as a sum of consecutive naturals, namely, 29511356 + ... + 29511371.

It is an arithmetic number, because the mean of its divisors is an integer number (110667615).

Almost surely, 2^472181816 is an apocalyptic number.

It is an amenable number.

472181816 is a deficient number, since it is larger than the sum of its proper divisors (413159104).

472181816 is a wasteful number, since it uses less digits than its factorization.

472181816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59022733 (or 59022729 counting only the distinct ones).

The product of its digits is 21504, while the sum is 38.

The square root of 472181816 is about 21729.7449593869. The cubic root of 472181816 is about 778.6992433685.

The spelling of 472181816 in words is "four hundred seventy-two million, one hundred eighty-one thousand, eight hundred sixteen".