49251815 has 4 divisors (see below), whose sum is σ = 59102184. Its totient is φ = 39401448.

The previous prime is 49251793. The next prime is 49251869. The reversal of 49251815 is 51815294.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51815294 = 2 ⋅25907647.

It is a cyclic number.

It is not a de Polignac number, because 49251815 - 2⁶ = 49251751 is a prime.

It is a Duffinian 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, 4925177 + ... + 4925186.

It is an arithmetic number, because the mean of its divisors is an integer number (14775546).

Almost surely, 2^49251815 is an apocalyptic number.

49251815 is a deficient number, since it is larger than the sum of its proper divisors (9850369).

49251815 is an equidigital number, since it uses as much as digits as its factorization.

49251815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9850368.

The product of its digits is 14400, while the sum is 35.

The square root of 49251815 is about 7017.9637360135. The cubic root of 49251815 is about 366.5563492736.

The spelling of 49251815 in words is "forty-nine million, two hundred fifty-one thousand, eight hundred fifteen".