49381815 has 16 divisors (see below), whose sum is σ = 90298368. Its totient is φ = 22574496.

The previous prime is 49381811. The next prime is 49381823. The reversal of 49381815 is 51818394.

It is not a de Polignac number, because 49381815 - 2² = 49381811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49381811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235047 + ... + 235256.

It is an arithmetic number, because the mean of its divisors is an integer number (5643648).

Almost surely, 2^49381815 is an apocalyptic number.

49381815 is a deficient number, since it is larger than the sum of its proper divisors (40916553).

49381815 is a wasteful number, since it uses less digits than its factorization.

49381815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470318.

The product of its digits is 34560, while the sum is 39.

The square root of 49381815 is about 7027.2195781831. The cubic root of 49381815 is about 366.8785740195.

The spelling of 49381815 in words is "forty-nine million, three hundred eighty-one thousand, eight hundred fifteen".