47131520 has 32 divisors (see below), whose sum is σ = 112675320. Its totient is φ = 18852352.

The previous prime is 47131519. The next prime is 47131523. The reversal of 47131520 is 2513174.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47131523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36182 + ... + 37461.

Almost surely, 2^47131520 is an apocalyptic number.

47131520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47131520 is an abundant number, since it is smaller than the sum of its proper divisors (65543800).

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

47131520 is an equidigital number, since it uses as much as digits as its factorization.

47131520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73662 (or 73650 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 47131520 is about 6865.2399812388. The cubic root of 47131520 is about 361.2189135257.

Adding to 47131520 its reverse (2513174), we get a palindrome (49644694).

The spelling of 47131520 in words is "forty-seven million, one hundred thirty-one thousand, five hundred twenty".