50161213 has 4 divisors (see below), whose sum is σ = 51890940. Its totient is φ = 48431488.

The previous prime is 50161207. The next prime is 50161217. The reversal of 50161213 is 31216105.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24334489 + 25826724 = 4933^2 + 5082^2 .

It is a cyclic number.

It is not a de Polignac number, because 50161213 - 2¹³ = 50153021 is a prime.

It is a super-2 number, since 2×50161213² = 5032294579262738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50161217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 864820 + ... + 864877.

It is an arithmetic number, because the mean of its divisors is an integer number (12972735).

Almost surely, 2^50161213 is an apocalyptic number.

It is an amenable number.

50161213 is a deficient number, since it is larger than the sum of its proper divisors (1729727).

50161213 is a wasteful number, since it uses less digits than its factorization.

50161213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729726.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 50161213 is about 7082.4581184784. The cubic root of 50161213 is about 368.7986675974.

Adding to 50161213 its reverse (31216105), we get a palindrome (81377318).

The spelling of 50161213 in words is "fifty million, one hundred sixty-one thousand, two hundred thirteen".