50613509 has 4 divisors (see below), whose sum is σ = 50836704. Its totient is φ = 50390316.

The previous prime is 50613457. The next prime is 50613517. The reversal of 50613509 is 90531605.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90531605 = 5 ⋅18106321.

It is a cyclic number.

It is not a de Polignac number, because 50613509 - 2⁸ = 50613253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50613529) 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, 111257 + ... + 111710.

It is an arithmetic number, because the mean of its divisors is an integer number (12709176).

Almost surely, 2^50613509 is an apocalyptic number.

It is an amenable number.

50613509 is a deficient number, since it is larger than the sum of its proper divisors (223195).

50613509 is a wasteful number, since it uses less digits than its factorization.

50613509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223194.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 50613509 is about 7114.3171843825. The cubic root of 50613509 is about 369.9038196559.

The spelling of 50613509 in words is "fifty million, six hundred thirteen thousand, five hundred nine".