50287621 has 4 divisors (see below), whose sum is σ = 50313132. Its totient is φ = 50262112.

The previous prime is 50287609. The next prime is 50287639. The reversal of 50287621 is 12678205.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12678205 = 5 ⋅2535641.

It can be written as a sum of positive squares in 2 ways, for example, as 20802721 + 29484900 = 4561^2 + 5430^2 .

It is a cyclic number.

It is not a de Polignac number, because 50287621 - 2⁹ = 50287109 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50285621) 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, 9526 + ... + 13831.

It is an arithmetic number, because the mean of its divisors is an integer number (12578283).

Almost surely, 2^50287621 is an apocalyptic number.

It is an amenable number.

50287621 is a deficient number, since it is larger than the sum of its proper divisors (25511).

50287621 is a wasteful number, since it uses less digits than its factorization.

50287621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25510.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 50287621 is about 7091.3765236377. The cubic root of 50287621 is about 369.1082028827.

The spelling of 50287621 in words is "fifty million, two hundred eighty-seven thousand, six hundred twenty-one".