47771131 has 4 divisors (see below), whose sum is σ = 47844064. Its totient is φ = 47698200.

The previous prime is 47771123. The next prime is 47771147. The reversal of 47771131 is 13117774.

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 47771131 - 2³ = 47771123 is a prime.

It is a super-2 number, since 2×47771131² = 4564161914038322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47771093 and 47771102.

It is not an unprimeable number, because it can be changed into a prime (47777131) 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, 35475 + ... + 36796.

It is an arithmetic number, because the mean of its divisors is an integer number (11961016).

Almost surely, 2^47771131 is an apocalyptic number.

47771131 is a deficient number, since it is larger than the sum of its proper divisors (72933).

47771131 is an equidigital number, since it uses as much as digits as its factorization.

47771131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72932.

The product of its digits is 4116, while the sum is 31.

The square root of 47771131 is about 6911.6662969215. Note that the first 3 decimals coincide. The cubic root of 47771131 is about 362.8455833998.

The spelling of 47771131 in words is "forty-seven million, seven hundred seventy-one thousand, one hundred thirty-one".