47851931 has 2 divisors, whose sum is σ = 47851932. Its totient is φ = 47851930.

The previous prime is 47851919. The next prime is 47851933. The reversal of 47851931 is 13915874.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47851931 - 2¹⁴ = 47835547 is a prime.

It is a super-2 number, since 2×47851931² = 4579614600857522, which contains 22 as substring.

Together with 47851933, 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 (47851933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23925965 + 23925966.

It is an arithmetic number, because the mean of its divisors is an integer number (23925966).

Almost surely, 2^47851931 is an apocalyptic number.

47851931 is a deficient number, since it is larger than the sum of its proper divisors (1).

47851931 is an equidigital number, since it uses as much as digits as its factorization.

47851931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 47851931 is about 6917.5090169800. The cubic root of 47851931 is about 363.0500402801.

The spelling of 47851931 in words is "forty-seven million, eight hundred fifty-one thousand, nine hundred thirty-one".