47148931 has 4 divisors (see below), whose sum is σ = 47581600. Its totient is φ = 46716264.

The previous prime is 47148917. The next prime is 47148953. The reversal of 47148931 is 13984174.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47148931 is a prime.

It is a super-2 number, since 2×47148931² = 4446043388885522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47118931) 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, 216171 + ... + 216388.

It is an arithmetic number, because the mean of its divisors is an integer number (11895400).

Almost surely, 2^47148931 is an apocalyptic number.

47148931 is a deficient number, since it is larger than the sum of its proper divisors (432669).

47148931 is a wasteful number, since it uses less digits than its factorization.

47148931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432668.

The product of its digits is 24192, while the sum is 37.

The square root of 47148931 is about 6866.5079188770. The cubic root of 47148931 is about 361.2633877136.

The spelling of 47148931 in words is "forty-seven million, one hundred forty-eight thousand, nine hundred thirty-one".