51090871 has 8 divisors (see below), whose sum is σ = 55167840. Its totient is φ = 47034912.

The previous prime is 51090869. The next prime is 51090911. The reversal of 51090871 is 17809015.

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 51090871 - 2¹ = 51090869 is a prime.

It is a super-2 number, since 2×51090871² = 5220554199077282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51090271) 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, 6 + ... + 10108.

It is an arithmetic number, because the mean of its divisors is an integer number (6895980).

Almost surely, 2^51090871 is an apocalyptic number.

51090871 is a deficient number, since it is larger than the sum of its proper divisors (4076969).

51090871 is a wasteful number, since it uses less digits than its factorization.

51090871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10505.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 51090871 is about 7147.7878396046. The cubic root of 51090871 is about 371.0631003073.

Adding to 51090871 its reverse (17809015), we get a palindrome (68899886).

The spelling of 51090871 in words is "fifty-one million, ninety thousand, eight hundred seventy-one".