47247431 has 16 divisors (see below), whose sum is σ = 59125248. Its totient is φ = 36679200.

The previous prime is 47247419. The next prime is 47247449. The reversal of 47247431 is 13474274.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47247431 is a prime.

It is a super-2 number, since 2×47247431² = 4464639472199522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47247401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22961 + ... + 24933.

It is an arithmetic number, because the mean of its divisors is an integer number (3695328).

Almost surely, 2^47247431 is an apocalyptic number.

47247431 is a deficient number, since it is larger than the sum of its proper divisors (11877817).

47247431 is a wasteful number, since it uses less digits than its factorization.

47247431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302.

The product of its digits is 18816, while the sum is 32.

The square root of 47247431 is about 6873.6766726403. The cubic root of 47247431 is about 361.5147874912.

The spelling of 47247431 in words is "forty-seven million, two hundred forty-seven thousand, four hundred thirty-one".