47312831 has 8 divisors (see below), whose sum is σ = 49902720. Its totient is φ = 44732952.

The previous prime is 47312827. The next prime is 47312849. The reversal of 47312831 is 13821374.

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

It is a cyclic number.

It is not a de Polignac number, because 47312831 - 2² = 47312827 is a prime.

It is a super-2 number, since 2×47312831² = 4477007954469122, 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 = 47312794 and 47312803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47312821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8486 + ... + 12908.

It is an arithmetic number, because the mean of its divisors is an integer number (6237840).

Almost surely, 2^47312831 is an apocalyptic number.

47312831 is a deficient number, since it is larger than the sum of its proper divisors (2589889).

47312831 is a wasteful number, since it uses less digits than its factorization.

47312831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5005.

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

The square root of 47312831 is about 6878.4323068560. The cubic root of 47312831 is about 361.6815137805.

The spelling of 47312831 in words is "forty-seven million, three hundred twelve thousand, eight hundred thirty-one".