51745980 has 192 divisors, whose sum is σ = 175891968. Its totient is φ = 11197440.

The previous prime is 51745979. The next prime is 51746003. The reversal of 51745980 is 8954715.

51745980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 63 ways as a sum of consecutive naturals, for example, 317379 + ... + 317541.

It is an arithmetic number, because the mean of its divisors is an integer number (916104).

Almost surely, 2^51745980 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 51745980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87945984).

51745980 is an abundant number, since it is smaller than the sum of its proper divisors (124145988).

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

51745980 is a wasteful number, since it uses less digits than its factorization.

51745980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 51745980 is about 7193.4678702278. The cubic root of 51745980 is about 372.6423460898.

It can be divided in two parts, 51745 and 980, that added together give a palindrome (52725).

The spelling of 51745980 in words is "fifty-one million, seven hundred forty-five thousand, nine hundred eighty".