47144631 has 4 divisors (see below), whose sum is σ = 62859512. Its totient is φ = 31429752.

The previous prime is 47144597. The next prime is 47144651. The reversal of 47144631 is 13644174.

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

It is a de Polignac number, because none of the positive numbers 2^k-47144631 is a prime.

It is a super-2 number, since 2×47144631² = 4445232464252322, 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 (47144651) 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, 7857436 + ... + 7857441.

It is an arithmetic number, because the mean of its divisors is an integer number (15714878).

Almost surely, 2^47144631 is an apocalyptic number.

47144631 is a deficient number, since it is larger than the sum of its proper divisors (15714881).

47144631 is a wasteful number, since it uses less digits than its factorization.

47144631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15714880.

The product of its digits is 8064, while the sum is 30.

The square root of 47144631 is about 6866.1947977027. The cubic root of 47144631 is about 361.2524049281.

The spelling of 47144631 in words is "forty-seven million, one hundred forty-four thousand, six hundred thirty-one".