49815171 has 48 divisors (see below), whose sum is σ = 88657920. Its totient is φ = 26326080.

The previous prime is 49815149. The next prime is 49815173. The reversal of 49815171 is 17151894.

49815171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

49815171 is a nontrivial binomial coefficient, being equal to C(9982, 2).

It is not a de Polignac number, because 49815171 - 2⁷ = 49815043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49815173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44365 + ... + 45473.

It is an arithmetic number, because the mean of its divisors is an integer number (1847040).

Almost surely, 2^49815171 is an apocalyptic number.

49815171 is the 9981-st triangular number and also the 4991-st hexagonal number.

49815171 is a deficient number, since it is larger than the sum of its proper divisors (38842749).

49815171 is a wasteful number, since it uses less digits than its factorization.

49815171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176 (or 1173 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 49815171 is about 7057.9863275583. The cubic root of 49815171 is about 367.9486454606.

The spelling of 49815171 in words is "forty-nine million, eight hundred fifteen thousand, one hundred seventy-one".