47957218 has 4 divisors (see below), whose sum is σ = 71935830. Its totient is φ = 23978608.

The previous prime is 47957207. The next prime is 47957227. The reversal of 47957218 is 81275974.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 47651409 + 305809 = 6903^2 + 553^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11989303 + ... + 11989306.

Almost surely, 2^47957218 is an apocalyptic number.

47957218 is a deficient number, since it is larger than the sum of its proper divisors (23978612).

47957218 is a wasteful number, since it uses less digits than its factorization.

47957218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23978611.

The product of its digits is 141120, while the sum is 43.

The square root of 47957218 is about 6925.1150170954. The cubic root of 47957218 is about 363.3161141762.

The spelling of 47957218 in words is "forty-seven million, nine hundred fifty-seven thousand, two hundred eighteen".