51820342 has 12 divisors (see below), whose sum is σ = 90421380. Its totient is φ = 22208676.

The previous prime is 51820337. The next prime is 51820343. The reversal of 51820342 is 24302815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51820343) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 264292 + ... + 264487.

It is an arithmetic number, because the mean of its divisors is an integer number (7535115).

Almost surely, 2^51820342 is an apocalyptic number.

51820342 is a deficient number, since it is larger than the sum of its proper divisors (38601038).

51820342 is a wasteful number, since it uses less digits than its factorization.

51820342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528795 (or 528788 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 51820342 is about 7198.6347316696. The cubic root of 51820342 is about 372.8207636010.

The spelling of 51820342 in words is "fifty-one million, eight hundred twenty thousand, three hundred forty-two".