47157220 has 24 divisors (see below), whose sum is σ = 108033408. Its totient is φ = 17148000.

The previous prime is 47157191. The next prime is 47157247. The reversal of 47157220 is 2275174.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106956 + ... + 107395.

It is an arithmetic number, because the mean of its divisors is an integer number (4501392).

Almost surely, 2^47157220 is an apocalyptic number.

It is an amenable number.

47157220 is an abundant number, since it is smaller than the sum of its proper divisors (60876188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47157220 is a wasteful number, since it uses less digits than its factorization.

47157220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214371 (or 214369 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 47157220 is about 6867.1114742663. Note that the first 3 decimals coincide. The cubic root of 47157220 is about 361.2845570642.

It can be divided in two parts, 4715 and 7220, that added together give a triangular number (11935 = T₁₅₄).

The spelling of 47157220 in words is "forty-seven million, one hundred fifty-seven thousand, two hundred twenty".