51554505 has 32 divisors (see below), whose sum is σ = 89193600. Its totient is φ = 25339392.

The previous prime is 51554501. The next prime is 51554521. The reversal of 51554505 is 50545515.

It is not a de Polignac number, because 51554505 - 2² = 51554501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51554501) 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 31 ways as a sum of consecutive naturals, for example, 8101 + ... + 12989.

It is an arithmetic number, because the mean of its divisors is an integer number (2787300).

Almost surely, 2^51554505 is an apocalyptic number.

It is an amenable number.

51554505 is a deficient number, since it is larger than the sum of its proper divisors (37639095).

51554505 is a wasteful number, since it uses less digits than its factorization.

51554505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4953.

The product of its (nonzero) digits is 12500, while the sum is 30.

The square root of 51554505 is about 7180.1465862474. The cubic root of 51554505 is about 372.1821500717.

The spelling of 51554505 in words is "fifty-one million, five hundred fifty-four thousand, five hundred five".