51547380 has 96 divisors (see below), whose sum is σ = 153753600. Its totient is φ = 12866688.

The previous prime is 51547369. The next prime is 51547459. The reversal of 51547380 is 8374515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117201 + ... + 117639.

It is an arithmetic number, because the mean of its divisors is an integer number (1601600).

Almost surely, 2^51547380 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 51547380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76876800).

51547380 is an abundant number, since it is smaller than the sum of its proper divisors (102206220).

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

51547380 is a wasteful number, since it uses less digits than its factorization.

51547380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573 (or 571 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 51547380 is about 7179.6504093166. The cubic root of 51547380 is about 372.1650036879.

It can be divided in two parts, 515 and 47380, that added together give a triangular number (47895 = T₃₀₉).

The spelling of 51547380 in words is "fifty-one million, five hundred forty-seven thousand, three hundred eighty".