51554444 has 6 divisors (see below), whose sum is σ = 90220284. Its totient is φ = 25777220.

The previous prime is 51554443. The next prime is 51554483. The reversal of 51554444 is 44445515.

It is a super-2 number, since 2×51554444² = 5315721392298272, 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 51554444.

It is not an unprimeable number, because it can be changed into a prime (51554443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6444302 + ... + 6444309.

It is an arithmetic number, because the mean of its divisors is an integer number (15036714).

Almost surely, 2^51554444 is an apocalyptic number.

It is an amenable number.

51554444 is a deficient number, since it is larger than the sum of its proper divisors (38665840).

51554444 is a wasteful number, since it uses less digits than its factorization.

51554444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12888615 (or 12888613 counting only the distinct ones).

The product of its digits is 32000, while the sum is 32.

The square root of 51554444 is about 7180.1423384220. The cubic root of 51554444 is about 372.1820032813.

Adding to 51554444 its reverse (44445515), we get a palindrome (95999959).

The spelling of 51554444 in words is "fifty-one million, five hundred fifty-four thousand, four hundred forty-four".