50512213 has 4 divisors (see below), whose sum is σ = 50791468. Its totient is φ = 50232960.

The previous prime is 50512211. The next prime is 50512249. The reversal of 50512213 is 31221505.

It is the 2902-nd star number.

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 26286129 + 24226084 = 5127^2 + 4922^2 .

It is a cyclic number.

It is not a de Polignac number, because 50512213 - 2¹ = 50512211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50512211) 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, 139356 + ... + 139717.

It is an arithmetic number, because the mean of its divisors is an integer number (12697867).

Almost surely, 2^50512213 is an apocalyptic number.

It is an amenable number.

50512213 is a deficient number, since it is larger than the sum of its proper divisors (279255).

50512213 is a wasteful number, since it uses less digits than its factorization.

50512213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279254.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 50512213 is about 7107.1944535098. The cubic root of 50512213 is about 369.6568842509.

Adding to 50512213 its reverse (31221505), we get a palindrome (81733718).

The spelling of 50512213 in words is "fifty million, five hundred twelve thousand, two hundred thirteen".