47878331 has 4 divisors (see below), whose sum is σ = 47896632. Its totient is φ = 47860032.

The previous prime is 47878297. The next prime is 47878357. The reversal of 47878331 is 13387874.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47878331 is a prime.

It is a super-2 number, since 2×47878331² = 4584669158691122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47878031) 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, 4406 + ... + 10731.

It is an arithmetic number, because the mean of its divisors is an integer number (11974158).

Almost surely, 2^47878331 is an apocalyptic number.

47878331 is a deficient number, since it is larger than the sum of its proper divisors (18301).

47878331 is a wasteful number, since it uses less digits than its factorization.

47878331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18300.

The product of its digits is 112896, while the sum is 41.

The square root of 47878331 is about 6919.4169552066. The cubic root of 47878331 is about 363.1167931348.

The spelling of 47878331 in words is "forty-seven million, eight hundred seventy-eight thousand, three hundred thirty-one".