51098320 has 80 divisors (see below), whose sum is σ = 146240640. Its totient is φ = 16169472.

The previous prime is 51098317. The next prime is 51098347. The reversal of 51098320 is 2389015.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×51098320² = 5222076613644800, which contains 22 as substring.

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, 3771 + ... + 10789.

It is an arithmetic number, because the mean of its divisors is an integer number (1828008).

Almost surely, 2^51098320 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 51098320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73120320).

51098320 is an abundant number, since it is smaller than the sum of its proper divisors (95142320).

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

51098320 is a wasteful number, since it uses less digits than its factorization.

51098320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7052 (or 7046 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 51098320 is about 7148.3088909196. The cubic root of 51098320 is about 371.0811329790.

The spelling of 51098320 in words is "fifty-one million, ninety-eight thousand, three hundred twenty".