51271880 has 64 divisors (see below), whose sum is σ = 132494400. Its totient is φ = 17660160.

The previous prime is 51271879. The next prime is 51271907. The reversal of 51271880 is 8817215.

It is a happy number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5294 + ... + 11426.

It is an arithmetic number, because the mean of its divisors is an integer number (2070225).

Almost surely, 2^51271880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51271880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66247200).

51271880 is an abundant number, since it is smaller than the sum of its proper divisors (81222520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51271880 is a wasteful number, since it uses less digits than its factorization.

51271880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6174 (or 6170 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 51271880 is about 7160.4385340564. The cubic root of 51271880 is about 371.5007949157.

It can be divided in two parts, 5127 and 1880, that added together give a palindrome (7007).

The spelling of 51271880 in words is "fifty-one million, two hundred seventy-one thousand, eight hundred eighty".