51741990 has 96 divisors (see below), whose sum is σ = 141523200. Its totient is φ = 13600224.

The previous prime is 51741983. The next prime is 51742001. The reversal of 51741990 is 9914715.

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 47 ways as a sum of consecutive naturals, for example, 259911 + ... + 260109.

It is an arithmetic number, because the mean of its divisors is an integer number (1474200).

Almost surely, 2^51741990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51741990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70761600).

51741990 is an abundant number, since it is smaller than the sum of its proper divisors (89781210).

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

51741990 is a wasteful number, since it uses less digits than its factorization.

51741990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 51741990 is about 7193.1905299387. The cubic root of 51741990 is about 372.6327680113.

The spelling of 51741990 in words is "fifty-one million, seven hundred forty-one thousand, nine hundred ninety".