47118731 has 8 divisors (see below), whose sum is σ = 51828528. Its totient is φ = 42834000.

The previous prime is 47118691. The next prime is 47118737. The reversal of 47118731 is 13781174.

It is a happy number.

It is not a de Polignac number, because 47118731 - 2¹⁴ = 47102347 is a prime.

It is a super-2 number, since 2×47118731² = 4440349622100722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47118737) 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, 16370 + ... + 19031.

It is an arithmetic number, because the mean of its divisors is an integer number (6478566).

Almost surely, 2^47118731 is an apocalyptic number.

47118731 is a deficient number, since it is larger than the sum of its proper divisors (4709797).

47118731 is an equidigital number, since it uses as much as digits as its factorization.

47118731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35434 (or 35412 counting only the distinct ones).

The product of its digits is 4704, while the sum is 32.

The square root of 47118731 is about 6864.3084866576. The cubic root of 47118731 is about 361.1862386718.

The spelling of 47118731 in words is "forty-seven million, one hundred eighteen thousand, seven hundred thirty-one".