47231131 has 4 divisors (see below), whose sum is σ = 49717000. Its totient is φ = 44745264.

The previous prime is 47231123. The next prime is 47231137. The reversal of 47231131 is 13113274.

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

It is a cyclic number.

It is not a de Polignac number, because 47231131 - 2³ = 47231123 is a prime.

It is a super-2 number, since 2×47231131² = 4461559471078322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47231137) 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, 1242906 + ... + 1242943.

It is an arithmetic number, because the mean of its divisors is an integer number (12429250).

Almost surely, 2^47231131 is an apocalyptic number.

47231131 is a deficient number, since it is larger than the sum of its proper divisors (2485869).

47231131 is a wasteful number, since it uses less digits than its factorization.

47231131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2485868.

The product of its digits is 504, while the sum is 22.

The square root of 47231131 is about 6872.4908875894. The cubic root of 47231131 is about 361.4732094365.

The spelling of 47231131 in words is "forty-seven million, two hundred thirty-one thousand, one hundred thirty-one".