51642841 has 4 divisors (see below), whose sum is σ = 51789492. Its totient is φ = 51496192.

The previous prime is 51642839. The next prime is 51642847. The reversal of 51642841 is 14824615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10426441 + 41216400 = 3229^2 + 6420^2 .

It is a cyclic number.

It is not a de Polignac number, because 51642841 - 2¹ = 51642839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51642847) 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, 72796 + ... + 73501.

It is an arithmetic number, because the mean of its divisors is an integer number (12947373).

Almost surely, 2^51642841 is an apocalyptic number.

It is an amenable number.

51642841 is a deficient number, since it is larger than the sum of its proper divisors (146651).

51642841 is a wasteful number, since it uses less digits than its factorization.

51642841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146650.

The product of its digits is 7680, while the sum is 31.

The square root of 51642841 is about 7186.2953599195. The cubic root of 51642841 is about 372.3946004517.

The spelling of 51642841 in words is "fifty-one million, six hundred forty-two thousand, eight hundred forty-one".