47331881 has 2 divisors, whose sum is σ = 47331882. Its totient is φ = 47331880.

The previous prime is 47331877. The next prime is 47331883. The reversal of 47331881 is 18813374.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46717225 + 614656 = 6835^2 + 784^2 .

It is a cyclic number.

It is not a de Polignac number, because 47331881 - 2² = 47331877 is a prime.

It is a super-2 number, since 2×47331881² = 4480613917996322, which contains 22 as substring.

Together with 47331883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47331883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23665940 + 23665941.

It is an arithmetic number, because the mean of its divisors is an integer number (23665941).

Almost surely, 2^47331881 is an apocalyptic number.

It is an amenable number.

47331881 is a deficient number, since it is larger than the sum of its proper divisors (1).

47331881 is an equidigital number, since it uses as much as digits as its factorization.

47331881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The square root of 47331881 is about 6879.8169307039. The cubic root of 47331881 is about 361.7300496510.

The spelling of 47331881 in words is "forty-seven million, three hundred thirty-one thousand, eight hundred eighty-one".