50566261 has 4 divisors (see below), whose sum is σ = 50711500. Its totient is φ = 50421024.

The previous prime is 50566253. The next prime is 50566267. The reversal of 50566261 is 16266505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16266505 = 5 ⋅3253301.

It can be written as a sum of positive squares in 2 ways, for example, as 36360900 + 14205361 = 6030^2 + 3769^2 .

It is a cyclic number.

It is not a de Polignac number, because 50566261 - 2³ = 50566253 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 (50566267) 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, 72096 + ... + 72793.

It is an arithmetic number, because the mean of its divisors is an integer number (12677875).

Almost surely, 2^50566261 is an apocalyptic number.

It is an amenable number.

50566261 is a deficient number, since it is larger than the sum of its proper divisors (145239).

50566261 is a wasteful number, since it uses less digits than its factorization.

50566261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145238.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 50566261 is about 7110.9957811828. The cubic root of 50566261 is about 369.7886813776.

It can be divided in two parts, 505 and 66261, that added together give a palindrome (66766).

The spelling of 50566261 in words is "fifty million, five hundred sixty-six thousand, two hundred sixty-one".