51832281 has 4 divisors (see below), whose sum is σ = 69109712. Its totient is φ = 34554852.

The previous prime is 51832237. The next prime is 51832289. The reversal of 51832281 is 18223815.

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 not a de Polignac number, because 51832281 - 2¹⁸ = 51570137 is a prime.

It is a super-2 number, since 2×51832281² = 5373170707325922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51832289) 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, 8638711 + ... + 8638716.

It is an arithmetic number, because the mean of its divisors is an integer number (17277428).

Almost surely, 2^51832281 is an apocalyptic number.

It is an amenable number.

51832281 is a deficient number, since it is larger than the sum of its proper divisors (17277431).

51832281 is a wasteful number, since it uses less digits than its factorization.

51832281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17277430.

The product of its digits is 3840, while the sum is 30.

The square root of 51832281 is about 7199.4639383776. The cubic root of 51832281 is about 372.8493930615.

The spelling of 51832281 in words is "fifty-one million, eight hundred thirty-two thousand, two hundred eighty-one".