47213831 has 8 divisors (see below), whose sum is σ = 54977184. Its totient is φ = 39705120.

The previous prime is 47213821. The next prime is 47213833. The reversal of 47213831 is 13831274.

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

It is a de Polignac number, because none of the positive numbers 2^k-47213831 is a prime.

It is a super-2 number, since 2×47213831² = 4458291675393122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47213794 and 47213803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47213833) 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, 63260 + ... + 64001.

It is an arithmetic number, because the mean of its divisors is an integer number (6872148).

Almost surely, 2^47213831 is an apocalyptic number.

47213831 is a deficient number, since it is larger than the sum of its proper divisors (7763353).

47213831 is a wasteful number, since it uses less digits than its factorization.

47213831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127321.

The product of its digits is 4032, while the sum is 29.

The square root of 47213831 is about 6871.2321311392. The cubic root of 47213831 is about 361.4290701152.

The spelling of 47213831 in words is "forty-seven million, two hundred thirteen thousand, eight hundred thirty-one".