47507881 has 4 divisors (see below), whose sum is σ = 47528272. Its totient is φ = 47487492.

The previous prime is 47507879. The next prime is 47507897. The reversal of 47507881 is 18870574.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47507881 - 2¹ = 47507879 is a prime.

It is a super-2 number, since 2×47507881² = 4513997514220322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47507861) 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, 6171 + ... + 11536.

It is an arithmetic number, because the mean of its divisors is an integer number (11882068).

Almost surely, 2^47507881 is an apocalyptic number.

It is an amenable number.

47507881 is a deficient number, since it is larger than the sum of its proper divisors (20391).

47507881 is a wasteful number, since it uses less digits than its factorization.

47507881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20390.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 47507881 is about 6892.5961001643. The cubic root of 47507881 is about 362.1778502981.

The spelling of 47507881 in words is "forty-seven million, five hundred seven thousand, eight hundred eighty-one".