51001284 has 12 divisors (see below), whose sum is σ = 119003024. Its totient is φ = 17000424.

The previous prime is 51001283. The next prime is 51001289. The reversal of 51001284 is 48210015.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×51001284² = 5202261939297312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51001284.

It is not an unprimeable number, because it can be changed into a prime (51001283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2125042 + ... + 2125065.

Almost surely, 2^51001284 is an apocalyptic number.

It is an amenable number.

51001284 is an abundant number, since it is smaller than the sum of its proper divisors (68001740).

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

51001284 is a wasteful number, since it uses less digits than its factorization.

51001284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4250114 (or 4250112 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 51001284 is about 7141.5183259584. The cubic root of 51001284 is about 370.8460890729.

Adding to 51001284 its reverse (48210015), we get a palindrome (99211299).

The spelling of 51001284 in words is "fifty-one million, one thousand, two hundred eighty-four".