51291 has 12 divisors (see below), whose sum is σ = 76440. Its totient is φ = 33120.

The previous prime is 51287. The next prime is 51307. The reversal of 51291 is 19215.

51291 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51291 - 2² = 51287 is a prime.

It is a plaindrome in base 11 and base 14.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (51241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 300 + ... + 438.

It is an arithmetic number, because the mean of its divisors is an integer number (6370).

2⁵¹²⁹¹ is an apocalyptic number.

51291 is a deficient number, since it is larger than the sum of its proper divisors (25149).

51291 is a wasteful number, since it uses less digits than its factorization.

51291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 183 counting only the distinct ones).

The product of its digits is 90, while the sum is 18.

The square root of 51291 is about 226.4751642013. The cubic root of 51291 is about 37.1546968455.

It can be divided in two parts, 51 and 291, that multiplied together give a palindrome (14841).

The spelling of 51291 in words is "fifty-one thousand, two hundred ninety-one".