51323553 has 12 divisors (see below), whose sum is σ = 75858640. Its totient is φ = 33419736.

The previous prime is 51323543. The next prime is 51323563. The reversal of 51323553 is 35532315.

It is an interprime number because it is at equal distance from previous prime (51323543) and next prime (51323563).

It is not a de Polignac number, because 51323553 - 2⁵ = 51323521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51323543) 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 11 ways as a sum of consecutive naturals, for example, 65923 + ... + 66696.

Almost surely, 2^51323553 is an apocalyptic number.

It is an amenable number.

51323553 is a deficient number, since it is larger than the sum of its proper divisors (24535087).

51323553 is a wasteful number, since it uses less digits than its factorization.

51323553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132668 (or 132665 counting only the distinct ones).

The product of its digits is 6750, while the sum is 27.

The square root of 51323553 is about 7164.0458541246. The cubic root of 51323553 is about 371.6255554099.

Adding to 51323553 its reverse (35532315), we get a palindrome (86855868).

The spelling of 51323553 in words is "fifty-one million, three hundred twenty-three thousand, five hundred fifty-three".