49855431 has 4 divisors (see below), whose sum is σ = 66473912. Its totient is φ = 33236952.

The previous prime is 49855387. The next prime is 49855439. The reversal of 49855431 is 13455894.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 49855431 - 2⁶ = 49855367 is a prime.

It is a super-2 number, since 2×49855431² = 4971128000391522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 49855431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49855439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8309236 + ... + 8309241.

It is an arithmetic number, because the mean of its divisors is an integer number (16618478).

Almost surely, 2^49855431 is an apocalyptic number.

49855431 is a deficient number, since it is larger than the sum of its proper divisors (16618481).

49855431 is a wasteful number, since it uses less digits than its factorization.

49855431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16618480.

The product of its digits is 86400, while the sum is 39.

The square root of 49855431 is about 7060.8378398034. The cubic root of 49855431 is about 368.0477426047.

The spelling of 49855431 in words is "forty-nine million, eight hundred fifty-five thousand, four hundred thirty-one".