50661213 has 4 divisors (see below), whose sum is σ = 67548288. Its totient is φ = 33774140.

The previous prime is 50661211. The next prime is 50661217. The reversal of 50661213 is 31216605.

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 50661213 - 2¹ = 50661211 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50661211) 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, 8443533 + ... + 8443538.

It is an arithmetic number, because the mean of its divisors is an integer number (16887072).

Almost surely, 2^50661213 is an apocalyptic number.

It is an amenable number.

50661213 is a deficient number, since it is larger than the sum of its proper divisors (16887075).

50661213 is a wasteful number, since it uses less digits than its factorization.

50661213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16887074.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 50661213 is about 7117.6690707000. The cubic root of 50661213 is about 370.0199964844.

Adding to 50661213 its reverse (31216605), we get a palindrome (81877818).

The spelling of 50661213 in words is "fifty million, six hundred sixty-one thousand, two hundred thirteen".