51487758 has 128 divisors (see below), whose sum is σ = 141004800. Its totient is φ = 13600224.

The previous prime is 51487753. The next prime is 51487769. The reversal of 51487758 is 85778415.

It is a happy number.

51487758 is a `hidden beast` number, since 514 + 87 + 7 + 58 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51487753) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 481141 + ... + 481247.

It is an arithmetic number, because the mean of its divisors is an integer number (1101600).

Almost surely, 2^51487758 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51487758, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70502400).

51487758 is an abundant number, since it is smaller than the sum of its proper divisors (89517042).

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

51487758 is a wasteful number, since it uses less digits than its factorization.

51487758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 205 counting only the distinct ones).

The product of its digits is 313600, while the sum is 45.

The square root of 51487758 is about 7175.4970559537. The cubic root of 51487758 is about 372.0214607806.

The spelling of 51487758 in words is "fifty-one million, four hundred eighty-seven thousand, seven hundred fifty-eight".