51941780 has 48 divisors (see below), whose sum is σ = 119629440. Its totient is φ = 18787200.

The previous prime is 51941753. The next prime is 51941803. The reversal of 51941780 is 8714915.

It is a self number, because there is not a number n which added to its sum of digits gives 51941780.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49865 + ... + 50895.

It is an arithmetic number, because the mean of its divisors is an integer number (2492280).

Almost surely, 2^51941780 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 51941780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59814720).

51941780 is an abundant number, since it is smaller than the sum of its proper divisors (67687660).

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

51941780 is a wasteful number, since it uses less digits than its factorization.

51941780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280 (or 1278 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 51941780 is about 7207.0645896925. The cubic root of 51941780 is about 373.1117644317. Note that the first 3 decimals are identical.

The spelling of 51941780 in words is "fifty-one million, nine hundred forty-one thousand, seven hundred eighty".