47121818 has 8 divisors (see below), whose sum is σ = 70796640. Its totient is φ = 23522940.

The previous prime is 47121799. The next prime is 47121827. The reversal of 47121818 is 81812174.

47121818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 17408 + ... + 19931.

It is an arithmetic number, because the mean of its divisors is an integer number (8849580).

Almost surely, 2^47121818 is an apocalyptic number.

47121818 is a deficient number, since it is larger than the sum of its proper divisors (23674822).

47121818 is a wasteful number, since it uses less digits than its factorization.

47121818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37972.

The product of its digits is 3584, while the sum is 32.

The square root of 47121818 is about 6864.5333417502. The cubic root of 47121818 is about 361.1941262468.

The spelling of 47121818 in words is "forty-seven million, one hundred twenty-one thousand, eight hundred eighteen".