51082891 has 8 divisors (see below), whose sum is σ = 52967520. Its totient is φ = 49206528.

The previous prime is 51082861. The next prime is 51082897. The reversal of 51082891 is 19828015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51082891 - 2¹⁷ = 50951819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51082897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12315 + ... + 15931.

It is an arithmetic number, because the mean of its divisors is an integer number (6620940).

Almost surely, 2^51082891 is an apocalyptic number.

51082891 is a deficient number, since it is larger than the sum of its proper divisors (1884629).

51082891 is a wasteful number, since it uses less digits than its factorization.

51082891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4133.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 51082891 is about 7147.2296031399. The cubic root of 51082891 is about 371.0437802366.

The spelling of 51082891 in words is "fifty-one million, eighty-two thousand, eight hundred ninety-one".