49512731 has 4 divisors (see below), whose sum is σ = 49786464. Its totient is φ = 49239000.

The previous prime is 49512691. The next prime is 49512779. The reversal of 49512731 is 13721594.

49512731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49512731 is a prime.

It is a super-2 number, since 2×49512731² = 4903021062156722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49512791) 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 3 ways as a sum of consecutive naturals, for example, 136595 + ... + 136956.

It is an arithmetic number, because the mean of its divisors is an integer number (12446616).

Almost surely, 2^49512731 is an apocalyptic number.

49512731 is a deficient number, since it is larger than the sum of its proper divisors (273733).

49512731 is a wasteful number, since it uses less digits than its factorization.

49512731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273732.

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

The square root of 49512731 is about 7036.5283343422. The cubic root of 49512731 is about 367.2024982110.

The spelling of 49512731 in words is "forty-nine million, five hundred twelve thousand, seven hundred thirty-one".