49881431 has 2 divisors, whose sum is σ = 49881432. Its totient is φ = 49881430.

The previous prime is 49881413. The next prime is 49881443. The reversal of 49881431 is 13418894.

Together with previous prime (49881413) 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 49881431 - 2¹⁴ = 49865047 is a prime.

It is a super-2 number, since 2×49881431² = 4976314317215522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49841431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24940715 + 24940716.

It is an arithmetic number, because the mean of its divisors is an integer number (24940716).

Almost surely, 2^49881431 is an apocalyptic number.

49881431 is a deficient number, since it is larger than the sum of its proper divisors (1).

49881431 is an equidigital number, since it uses as much as digits as its factorization.

49881431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 38.

The square root of 49881431 is about 7062.6787411010. The cubic root of 49881431 is about 368.1117114182. Note that the first 3 decimals are identical.

The spelling of 49881431 in words is "forty-nine million, eight hundred eighty-one thousand, four hundred thirty-one".