47240831 has 12 divisors (see below), whose sum is σ = 52174392. Its totient is φ = 42420000.

The previous prime is 47240813. The next prime is 47240833. The reversal of 47240831 is 13804274.

It is a de Polignac number, because none of the positive numbers 2^k-47240831 is a prime.

It is a super-2 number, since 2×47240831² = 4463392227141122, 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 = 47240794 and 47240803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47240833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112001 + ... + 112421.

It is an arithmetic number, because the mean of its divisors is an integer number (4347866).

Almost surely, 2^47240831 is an apocalyptic number.

47240831 is a deficient number, since it is larger than the sum of its proper divisors (4933561).

47240831 is a wasteful number, since it uses less digits than its factorization.

47240831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 47240831 is about 6873.1965634630. The cubic root of 47240831 is about 361.4979533575.

The spelling of 47240831 in words is "forty-seven million, two hundred forty thousand, eight hundred thirty-one".