51293340 has 72 divisors (see below), whose sum is σ = 177821280. Its totient is φ = 11723904.

The previous prime is 51293323. The next prime is 51293351. The reversal of 51293340 is 4339215.

51293340 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 an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 19095 + ... + 21614.

It is an arithmetic number, because the mean of its divisors is an integer number (2469740).

Almost surely, 2^51293340 is an apocalyptic number.

It is an amenable number.

51293340 is an abundant number, since it is smaller than the sum of its proper divisors (126527940).

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

51293340 is a wasteful number, since it uses less digits than its factorization.

51293340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40731 (or 40726 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 51293340 is about 7161.9368888590. The cubic root of 51293340 is about 371.5526186120.

The spelling of 51293340 in words is "fifty-one million, two hundred ninety-three thousand, three hundred forty".