50172513 has 4 divisors (see below), whose sum is σ = 66896688. Its totient is φ = 33448340.

The previous prime is 50172511. The next prime is 50172517. The reversal of 50172513 is 31527105.

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 50172513 - 2¹ = 50172511 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (50172511) 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, 8362083 + ... + 8362088.

It is an arithmetic number, because the mean of its divisors is an integer number (16724172).

Almost surely, 2^50172513 is an apocalyptic number.

It is an amenable number.

50172513 is a deficient number, since it is larger than the sum of its proper divisors (16724175).

50172513 is a wasteful number, since it uses less digits than its factorization.

50172513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16724174.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 50172513 is about 7083.2558191837. The cubic root of 50172513 is about 368.8263590599.

Adding to 50172513 its reverse (31527105), we get a palindrome (81699618).

The spelling of 50172513 in words is "fifty million, one hundred seventy-two thousand, five hundred thirteen".