51442241 has 4 divisors (see below), whose sum is σ = 51476400. Its totient is φ = 51408084.

The previous prime is 51442219. The next prime is 51442243. The reversal of 51442241 is 14224415.

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 51442241 - 2¹⁸ = 51180097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51442243) 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, 14711 + ... + 17868.

It is an arithmetic number, because the mean of its divisors is an integer number (12869100).

Almost surely, 2^51442241 is an apocalyptic number.

It is an amenable number.

51442241 is a deficient number, since it is larger than the sum of its proper divisors (34159).

51442241 is a wasteful number, since it uses less digits than its factorization.

51442241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34158.

The product of its digits is 1280, while the sum is 23.

The square root of 51442241 is about 7172.3246580171. The cubic root of 51442241 is about 371.9118017483.

Adding to 51442241 its reverse (14224415), we get a palindrome (65666656).

The spelling of 51442241 in words is "fifty-one million, four hundred forty-two thousand, two hundred forty-one".