49211765 has 4 divisors (see below), whose sum is σ = 59054124. Its totient is φ = 39369408.

The previous prime is 49211731. The next prime is 49211777. The reversal of 49211765 is 56711294.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28654609 + 20557156 = 5353^2 + 4534^2 .

It is a cyclic number.

It is not a de Polignac number, because 49211765 - 2⁸ = 49211509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 4921172 + ... + 4921181.

It is an arithmetic number, because the mean of its divisors is an integer number (14763531).

Almost surely, 2^49211765 is an apocalyptic number.

It is an amenable number.

49211765 is a deficient number, since it is larger than the sum of its proper divisors (9842359).

49211765 is an equidigital number, since it uses as much as digits as its factorization.

49211765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9842358.

The product of its digits is 15120, while the sum is 35.

The square root of 49211765 is about 7015.1097639310. The cubic root of 49211765 is about 366.4569650320.

The spelling of 49211765 in words is "forty-nine million, two hundred eleven thousand, seven hundred sixty-five".