50661311 has 4 divisors (see below), whose sum is σ = 50901624. Its totient is φ = 50421000.

The previous prime is 50661307. The next prime is 50661323. The reversal of 50661311 is 11316605.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11316605 = 5 ⋅2263321.

It is a cyclic number.

It is not a de Polignac number, because 50661311 - 2² = 50661307 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 (50661301) 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, 119840 + ... + 120261.

It is an arithmetic number, because the mean of its divisors is an integer number (12725406).

Almost surely, 2^50661311 is an apocalyptic number.

50661311 is a deficient number, since it is larger than the sum of its proper divisors (240313).

50661311 is a wasteful number, since it uses less digits than its factorization.

50661311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240312.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 50661311 is about 7117.6759549729. The cubic root of 50661311 is about 370.0202350755.

Adding to 50661311 its reverse (11316605), we get a palindrome (61977916).

The spelling of 50661311 in words is "fifty million, six hundred sixty-one thousand, three hundred eleven".