49315721 has 12 divisors (see below), whose sum is σ = 61031232. Its totient is φ = 39018096.

The previous prime is 49315663. The next prime is 49315723. The reversal of 49315721 is 12751394.

It is a de Polignac number, because none of the positive numbers 2^k-49315721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49315723) 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, 19661 + ... + 22026.

It is an arithmetic number, because the mean of its divisors is an integer number (5085936).

Almost surely, 2^49315721 is an apocalyptic number.

It is an amenable number.

49315721 is a deficient number, since it is larger than the sum of its proper divisors (11715511).

49315721 is a wasteful number, since it uses less digits than its factorization.

49315721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41720 (or 41707 counting only the distinct ones).

The product of its digits is 7560, while the sum is 32.

The square root of 49315721 is about 7022.5152901222. The cubic root of 49315721 is about 366.7148207647.

The spelling of 49315721 in words is "forty-nine million, three hundred fifteen thousand, seven hundred twenty-one".