51553386 has 12 divisors (see below), whose sum is σ = 111699042. Its totient is φ = 17184456.

The previous prime is 51553343. The next prime is 51553391. The reversal of 51553386 is 68335515.

It can be written as a sum of positive squares in only one way, i.e., 40564161 + 10989225 = 6369^2 + 3315^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51553386.

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 5 ways as a sum of consecutive naturals, for example, 1432021 + ... + 1432056.

Almost surely, 2^51553386 is an apocalyptic number.

51553386 is an abundant number, since it is smaller than the sum of its proper divisors (60145656).

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

51553386 is a wasteful number, since it uses less digits than its factorization.

51553386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2864085 (or 2864082 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 51553386 is about 7180.0686626243. The cubic root of 51553386 is about 372.1794572916.

The spelling of 51553386 in words is "fifty-one million, five hundred fifty-three thousand, three hundred eighty-six".