50390145 has 24 divisors (see below), whose sum is σ = 94062696. Its totient is φ = 24807168.

The previous prime is 50390117. The next prime is 50390149. The reversal of 50390145 is 54109305.

It can be written as a sum of positive squares in 4 ways, for example, as 3069504 + 47320641 = 1752^2 + 6879^2 .

It is not a de Polignac number, because 50390145 - 2¹¹ = 50388097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (50390149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42484 + ... + 43653.

It is an arithmetic number, because the mean of its divisors is an integer number (3919279).

Almost surely, 2^50390145 is an apocalyptic number.

It is an amenable number.

50390145 is a deficient number, since it is larger than the sum of its proper divisors (43672551).

50390145 is a wasteful number, since it uses less digits than its factorization.

50390145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86161 (or 86158 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 50390145 is about 7098.6016228550. The cubic root of 50390145 is about 369.3588726672.

The spelling of 50390145 in words is "fifty million, three hundred ninety thousand, one hundred forty-five".