47243381 has 2 divisors, whose sum is σ = 47243382. Its totient is φ = 47243380.

The previous prime is 47243377. The next prime is 47243393. The reversal of 47243381 is 18334274.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39262756 + 7980625 = 6266^2 + 2825^2 .

It is a cyclic number.

It is not a de Polignac number, because 47243381 - 2² = 47243377 is a prime.

It is a super-2 number, since 2×47243381² = 4463874096622322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47243321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23621690 + 23621691.

It is an arithmetic number, because the mean of its divisors is an integer number (23621691).

Almost surely, 2^47243381 is an apocalyptic number.

It is an amenable number.

47243381 is a deficient number, since it is larger than the sum of its proper divisors (1).

47243381 is an equidigital number, since it uses as much as digits as its factorization.

47243381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 32.

The square root of 47243381 is about 6873.3820641661. The cubic root of 47243381 is about 361.5044576404.

The spelling of 47243381 in words is "forty-seven million, two hundred forty-three thousand, three hundred eighty-one".