49775815 has 4 divisors (see below), whose sum is σ = 59730984. Its totient is φ = 39820648.

The previous prime is 49775809. The next prime is 49775833. The reversal of 49775815 is 51857794.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 49775815 - 2³ = 49775807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4977577 + ... + 4977586.

It is an arithmetic number, because the mean of its divisors is an integer number (14932746).

Almost surely, 2^49775815 is an apocalyptic number.

49775815 is a deficient number, since it is larger than the sum of its proper divisors (9955169).

49775815 is an equidigital number, since it uses as much as digits as its factorization.

49775815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9955168.

The product of its digits is 352800, while the sum is 46.

The square root of 49775815 is about 7055.1977293340. The cubic root of 49775815 is about 367.8517218274.

The spelling of 49775815 in words is "forty-nine million, seven hundred seventy-five thousand, eight hundred fifteen".