47181806 has 12 divisors (see below), whose sum is σ = 82327608. Its totient is φ = 20220732.

The previous prime is 47181803. The next prime is 47181821. The reversal of 47181806 is 60818174.

It is a super-2 number, since 2×47181806² = 4452245634843272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47181803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 240626 + ... + 240821.

It is an arithmetic number, because the mean of its divisors is an integer number (6860634).

Almost surely, 2^47181806 is an apocalyptic number.

47181806 is a deficient number, since it is larger than the sum of its proper divisors (35145802).

47181806 is a wasteful number, since it uses less digits than its factorization.

47181806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481463 (or 481456 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 47181806 is about 6868.9013677589. The cubic root of 47181806 is about 361.3473328802.

The spelling of 47181806 in words is "forty-seven million, one hundred eighty-one thousand, eight hundred six".