51222584 has 32 divisors (see below), whose sum is σ = 113551200. Its totient is φ = 21194880.

The previous prime is 51222583. The next prime is 51222617. The reversal of 51222584 is 48522215.

It is a super-2 number, since 2×51222584² = 5247506223274112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51222583) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14147 + ... + 17394.

It is an arithmetic number, because the mean of its divisors is an integer number (3548475).

Almost surely, 2^51222584 is an apocalyptic number.

It is an amenable number.

51222584 is an abundant number, since it is smaller than the sum of its proper divisors (62328616).

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

51222584 is a wasteful number, since it uses less digits than its factorization.

51222584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31583 (or 31579 counting only the distinct ones).

The product of its digits is 6400, while the sum is 29.

The square root of 51222584 is about 7156.9954589898. The cubic root of 51222584 is about 371.3816953522.

Adding to 51222584 its reverse (48522215), we get a palindrome (99744799).

The spelling of 51222584 in words is "fifty-one million, two hundred twenty-two thousand, five hundred eighty-four".