50121515 has 4 divisors (see below), whose sum is σ = 60145824. Its totient is φ = 40097208.

The previous prime is 50121481. The next prime is 50121529. The reversal of 50121515 is 51512105.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50121515 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5012147 + ... + 5012156.

It is an arithmetic number, because the mean of its divisors is an integer number (15036456).

Almost surely, 2^50121515 is an apocalyptic number.

50121515 is a deficient number, since it is larger than the sum of its proper divisors (10024309).

50121515 is a wasteful number, since it uses less digits than its factorization.

50121515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10024308.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 50121515 is about 7079.6550057189. The cubic root of 50121515 is about 368.7013518127.

The spelling of 50121515 in words is "fifty million, one hundred twenty-one thousand, five hundred fifteen".