49385251 has 4 divisors (see below), whose sum is σ = 49688392. Its totient is φ = 49082112.

The previous prime is 49385239. The next prime is 49385261. The reversal of 49385251 is 15258394.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15258394 = 2 ⋅7629197.

It is a cyclic number.

It is not a de Polignac number, because 49385251 - 2¹⁹ = 48860963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 49385251.

It is not an unprimeable number, because it can be changed into a prime (49385261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151326 + ... + 151651.

It is an arithmetic number, because the mean of its divisors is an integer number (12422098).

Almost surely, 2^49385251 is an apocalyptic number.

49385251 is a deficient number, since it is larger than the sum of its proper divisors (303141).

49385251 is a wasteful number, since it uses less digits than its factorization.

49385251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303140.

The product of its digits is 43200, while the sum is 37.

The square root of 49385251 is about 7027.4640518469. The cubic root of 49385251 is about 366.8870829922.

The spelling of 49385251 in words is "forty-nine million, three hundred eighty-five thousand, two hundred fifty-one".