47181540 has 48 divisors (see below), whose sum is σ = 150982272. Its totient is φ = 10784256.

The previous prime is 47181527. The next prime is 47181551. The reversal of 47181540 is 4518174.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 47181498 and 47181507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55749 + ... + 56588.

It is an arithmetic number, because the mean of its divisors is an integer number (3145464).

Almost surely, 2^47181540 is an apocalyptic number.

It is an amenable number.

47181540 is an abundant number, since it is smaller than the sum of its proper divisors (103800732).

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

47181540 is a wasteful number, since it uses less digits than its factorization.

47181540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112356 (or 112354 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 47181540 is about 6868.8820051010. The cubic root of 47181540 is about 361.3466538150.

The spelling of 47181540 in words is "forty-seven million, one hundred eighty-one thousand, five hundred forty".