49431591 has 12 divisors (see below), whose sum is σ = 77892360. Its totient is φ = 29958480.

The previous prime is 49431583. The next prime is 49431601. The reversal of 49431591 is 19513494.

It is a happy number.

It is not a de Polignac number, because 49431591 - 2³ = 49431583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49431581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 249556 + ... + 249753.

It is an arithmetic number, because the mean of its divisors is an integer number (6491030).

Almost surely, 2^49431591 is an apocalyptic number.

49431591 is a deficient number, since it is larger than the sum of its proper divisors (28460769).

49431591 is a wasteful number, since it uses less digits than its factorization.

49431591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499326 (or 499323 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 49431591 is about 7030.7603429501. The cubic root of 49431591 is about 367.0018016726.

The spelling of 49431591 in words is "forty-nine million, four hundred thirty-one thousand, five hundred ninety-one".