51819040 has 96 divisors (see below), whose sum is σ = 150716160. Its totient is φ = 16395264.

The previous prime is 51819037. The next prime is 51819059. The reversal of 51819040 is 4091815.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12781 + ... + 16339.

It is an arithmetic number, because the mean of its divisors is an integer number (1569960).

Almost surely, 2^51819040 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 51819040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75358080).

51819040 is an abundant number, since it is smaller than the sum of its proper divisors (98897120).

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

51819040 is a wasteful number, since it uses less digits than its factorization.

51819040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3594 (or 3586 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 51819040 is about 7198.5442972868. The cubic root of 51819040 is about 372.8176411676.

The spelling of 51819040 in words is "fifty-one million, eight hundred nineteen thousand, forty".