51019320 has 64 divisors (see below), whose sum is σ = 166976640. Its totient is φ = 12368000.

The previous prime is 51019291. The next prime is 51019321. The reversal of 51019320 is 2391015.

51019320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51019321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18006 + ... + 20645.

It is an arithmetic number, because the mean of its divisors is an integer number (2609010).

Almost surely, 2^51019320 is an apocalyptic number.

It is an amenable number.

51019320 is an abundant number, since it is smaller than the sum of its proper divisors (115957320).

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

51019320 is a wasteful number, since it uses less digits than its factorization.

51019320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38676 (or 38672 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 51019320 is about 7142.7809710224. The cubic root of 51019320 is about 370.8897990298.

The spelling of 51019320 in words is "fifty-one million, nineteen thousand, three hundred twenty".