51143280 has 40 divisors (see below), whose sum is σ = 158544912. Its totient is φ = 13638144.

The previous prime is 51143233. The next prime is 51143291. The reversal of 51143280 is 8234115.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 51143280.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106309 + ... + 106788.

Almost surely, 2^51143280 is an apocalyptic number.

It is an amenable number.

51143280 is an abundant number, since it is smaller than the sum of its proper divisors (107401632).

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

51143280 is a wasteful number, since it uses less digits than its factorization.

51143280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213113 (or 213107 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 51143280 is about 7151.4529992163. The cubic root of 51143280 is about 371.1899357532.

Adding to 51143280 its reverse (8234115), we get a palindrome (59377395).

The spelling of 51143280 in words is "fifty-one million, one hundred forty-three thousand, two hundred eighty".