47155521 has 8 divisors (see below), whose sum is σ = 71856064. Its totient is φ = 26946000.

The previous prime is 47155519. The next prime is 47155529. The reversal of 47155521 is 12555174.

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

It is not a de Polignac number, because 47155521 - 2¹ = 47155519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47155529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1122730 + ... + 1122771.

It is an arithmetic number, because the mean of its divisors is an integer number (8982008).

Almost surely, 2^47155521 is an apocalyptic number.

It is an amenable number.

47155521 is a deficient number, since it is larger than the sum of its proper divisors (24700543).

47155521 is a wasteful number, since it uses less digits than its factorization.

47155521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245511.

The product of its digits is 7000, while the sum is 30.

The square root of 47155521 is about 6866.9877675732. The cubic root of 47155521 is about 361.2802181752.

The spelling of 47155521 in words is "forty-seven million, one hundred fifty-five thousand, five hundred twenty-one".