50399155 has 4 divisors (see below), whose sum is σ = 60478992. Its totient is φ = 40319320.

The previous prime is 50399147. The next prime is 50399161. The reversal of 50399155 is 55199305.

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

It is not a de Polignac number, because 50399155 - 2³ = 50399147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5039911 + ... + 5039920.

It is an arithmetic number, because the mean of its divisors is an integer number (15119748).

Almost surely, 2^50399155 is an apocalyptic number.

50399155 is a deficient number, since it is larger than the sum of its proper divisors (10079837).

50399155 is a wasteful number, since it uses less digits than its factorization.

50399155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10079836.

The product of its (nonzero) digits is 30375, while the sum is 37.

The square root of 50399155 is about 7099.2362265247. The cubic root of 50399155 is about 369.3808857355.

The spelling of 50399155 in words is "fifty million, three hundred ninety-nine thousand, one hundred fifty-five".