50154991 has 4 divisors (see below), whose sum is σ = 50759352. Its totient is φ = 49550632.

The previous prime is 50154959. The next prime is 50154997. The reversal of 50154991 is 19945105.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19945105 = 5 ⋅3989021.

It is a cyclic number.

It is not a de Polignac number, because 50154991 - 2⁵ = 50154959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50154997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302056 + ... + 302221.

It is an arithmetic number, because the mean of its divisors is an integer number (12689838).

Almost surely, 2^50154991 is an apocalyptic number.

50154991 is a deficient number, since it is larger than the sum of its proper divisors (604361).

50154991 is an equidigital number, since it uses as much as digits as its factorization.

50154991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604360.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 50154991 is about 7082.0188505821. The cubic root of 50154991 is about 368.7834183637.

The spelling of 50154991 in words is "fifty million, one hundred fifty-four thousand, nine hundred ninety-one".