50215513 has 4 divisors (see below), whose sum is σ = 50347008. Its totient is φ = 50084020.

The previous prime is 50215511. The next prime is 50215553. The reversal of 50215513 is 31551205.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 50215513 - 2¹ = 50215511 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50215511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65173 + ... + 65938.

It is an arithmetic number, because the mean of its divisors is an integer number (12586752).

Almost surely, 2^50215513 is an apocalyptic number.

It is an amenable number.

50215513 is a deficient number, since it is larger than the sum of its proper divisors (131495).

50215513 is a wasteful number, since it uses less digits than its factorization.

50215513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131494.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 50215513 is about 7086.2904964445. The cubic root of 50215513 is about 368.9316956535.

Adding to 50215513 its reverse (31551205), we get a palindrome (81766718).

The spelling of 50215513 in words is "fifty million, two hundred fifteen thousand, five hundred thirteen".