47851831 has 2 divisors, whose sum is σ = 47851832. Its totient is φ = 47851830.

The previous prime is 47851813. The next prime is 47851847. The reversal of 47851831 is 13815874.

Together with previous prime (47851813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47851831 - 2⁷ = 47851703 is a prime.

It is a super-2 number, since 2×47851831² = 4579595460105122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47851871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23925915 + 23925916.

It is an arithmetic number, because the mean of its divisors is an integer number (23925916).

Almost surely, 2^47851831 is an apocalyptic number.

47851831 is a deficient number, since it is larger than the sum of its proper divisors (1).

47851831 is an equidigital number, since it uses as much as digits as its factorization.

47851831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 37.

The square root of 47851831 is about 6917.5017889409. The cubic root of 47851831 is about 363.0497873817.

The spelling of 47851831 in words is "forty-seven million, eight hundred fifty-one thousand, eight hundred thirty-one".