51847380 has 72 divisors (see below), whose sum is σ = 169375752. Its totient is φ = 12761856.

The previous prime is 51847357. The next prime is 51847403. The reversal of 51847380 is 8374815.

It is an interprime number because it is at equal distance from previous prime (51847357) and next prime (51847403).

It can be written as a sum of positive squares in 4 ways, for example, as 5225796 + 46621584 = 2286^2 + 6828^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8739 + ... + 13418.

It is an arithmetic number, because the mean of its divisors is an integer number (2352441).

Almost surely, 2^51847380 is an apocalyptic number.

It is an amenable number.

51847380 is an abundant number, since it is smaller than the sum of its proper divisors (117528372).

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

51847380 is a wasteful number, since it uses less digits than its factorization.

51847380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22185 (or 22180 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 51847380 is about 7200.5124817613. The cubic root of 51847380 is about 372.8855938378.

The spelling of 51847380 in words is "fifty-one million, eight hundred forty-seven thousand, three hundred eighty".