50512661 has 4 divisors (see below), whose sum is σ = 53484012. Its totient is φ = 47541312.

The previous prime is 50512643. The next prime is 50512681. The reversal of 50512661 is 16621505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16621505 = 5 ⋅3324301.

It can be written as a sum of positive squares in 2 ways, for example, as 42706225 + 7806436 = 6535^2 + 2794^2 .

It is a cyclic number.

It is not a de Polignac number, because 50512661 - 2⁶ = 50512597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50512661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50512681) 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, 1485650 + ... + 1485683.

It is an arithmetic number, because the mean of its divisors is an integer number (13371003).

Almost surely, 2^50512661 is an apocalyptic number.

It is an amenable number.

50512661 is a deficient number, since it is larger than the sum of its proper divisors (2971351).

50512661 is a wasteful number, since it uses less digits than its factorization.

50512661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2971350.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 50512661 is about 7107.2259707990. The cubic root of 50512661 is about 369.6579770942.

The spelling of 50512661 in words is "fifty million, five hundred twelve thousand, six hundred sixty-one".