51113800 has 48 divisors (see below), whose sum is σ = 125103600. Its totient is φ = 19368000.

The previous prime is 51113789. The next prime is 51113813. The reversal of 51113800 is 831115.

It is a super-2 number, since 2×51113800² = 5225241100880000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2926 + ... + 10525.

It is an arithmetic number, because the mean of its divisors is an integer number (2606325).

Almost surely, 2^51113800 is an apocalyptic number.

51113800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51113800 is an abundant number, since it is smaller than the sum of its proper divisors (73989800).

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

51113800 is a wasteful number, since it uses less digits than its factorization.

51113800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13486 (or 13477 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 51113800 is about 7149.3915825055. The cubic root of 51113800 is about 371.1186016339.

Adding to 51113800 its reverse (831115), we get a palindrome (51944915).

It can be divided in two parts, 5111 and 3800, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 51113800 in words is "fifty-one million, one hundred thirteen thousand, eight hundred".