51284610 has 128 divisors (see below), whose sum is σ = 155232000. Its totient is φ = 11943936.

The previous prime is 51284603. The next prime is 51284647. The reversal of 51284610 is 1648215.

It is a super-2 number, since 2×51284610² = 5260222445704200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 66306 + ... + 67074.

It is an arithmetic number, because the mean of its divisors is an integer number (1212750).

Almost surely, 2^51284610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51284610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77616000).

51284610 is an abundant number, since it is smaller than the sum of its proper divisors (103947390).

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

51284610 is a wasteful number, since it uses less digits than its factorization.

51284610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817 (or 811 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 51284610 is about 7161.3273909241. The cubic root of 51284610 is about 371.5315383029.

The spelling of 51284610 in words is "fifty-one million, two hundred eighty-four thousand, six hundred ten".