51221044 has 24 divisors (see below), whose sum is σ = 103503680. Its totient is φ = 21724416.

The previous prime is 51220999. The next prime is 51221057. The reversal of 51221044 is 44012215.

It is a congruent number.

It is an unprimeable number.

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, 6714 + ... + 12145.

Almost surely, 2^51221044 is an apocalyptic number.

It is an amenable number.

51221044 is an abundant number, since it is smaller than the sum of its proper divisors (52282636).

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

51221044 is a wasteful number, since it uses less digits than its factorization.

51221044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18967 (or 18965 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 51221044 is about 7156.8878711351. The cubic root of 51221044 is about 371.3779734683.

Adding to 51221044 its reverse (44012215), we get a palindrome (95233259).

The spelling of 51221044 in words is "fifty-one million, two hundred twenty-one thousand, forty-four".