51553222 has 16 divisors (see below), whose sum is σ = 88508160. Its totient is φ = 22061448.

The previous prime is 51553211. The next prime is 51553283. The reversal of 51553222 is 22235515.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8679 + ... + 13357.

It is an arithmetic number, because the mean of its divisors is an integer number (5531760).

Almost surely, 2^51553222 is an apocalyptic number.

51553222 is a deficient number, since it is larger than the sum of its proper divisors (36954938).

51553222 is a wasteful number, since it uses less digits than its factorization.

51553222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5475.

The product of its digits is 3000, while the sum is 25.

The square root of 51553222 is about 7180.0572421117. The cubic root of 51553222 is about 372.1790626360.

Adding to 51553222 its reverse (22235515), we get a palindrome (73788737).

The spelling of 51553222 in words is "fifty-one million, five hundred fifty-three thousand, two hundred twenty-two".