51481284 has 12 divisors (see below), whose sum is σ = 120123024. Its totient is φ = 17160424.

The previous prime is 51481247. The next prime is 51481343. The reversal of 51481284 is 48218415.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2145042 + ... + 2145065.

It is an arithmetic number, because the mean of its divisors is an integer number (10010252).

Almost surely, 2^51481284 is an apocalyptic number.

It is an amenable number.

51481284 is an abundant number, since it is smaller than the sum of its proper divisors (68641740).

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

51481284 is a wasteful number, since it uses less digits than its factorization.

51481284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4290114 (or 4290112 counting only the distinct ones).

The product of its digits is 10240, while the sum is 33.

The square root of 51481284 is about 7175.0459231980. The cubic root of 51481284 is about 372.0058676378.

Adding to 51481284 its reverse (48218415), we get a palindrome (99699699).

The spelling of 51481284 in words is "fifty-one million, four hundred eighty-one thousand, two hundred eighty-four".