51112780 has 12 divisors (see below), whose sum is σ = 107336880. Its totient is φ = 20445104.

The previous prime is 51112777. The next prime is 51112843. The reversal of 51112780 is 8721115.

It is a super-2 number, since 2×51112780² = 5225032558656800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1277800 + ... + 1277839.

It is an arithmetic number, because the mean of its divisors is an integer number (8944740).

Almost surely, 2^51112780 is an apocalyptic number.

It is an amenable number.

51112780 is an abundant number, since it is smaller than the sum of its proper divisors (56224100).

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

51112780 is a wasteful number, since it uses less digits than its factorization.

51112780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555648 (or 2555646 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 51112780 is about 7149.3202474081. The cubic root of 51112780 is about 371.1161330019.

Adding to 51112780 its reverse (8721115), we get a palindrome (59833895).

The spelling of 51112780 in words is "fifty-one million, one hundred twelve thousand, seven hundred eighty".