51045553 has 8 divisors (see below), whose sum is σ = 55292328. Its totient is φ = 46844544.

The previous prime is 51045551. The next prime is 51045583. The reversal of 51045553 is 35554015.

It can be written as a sum of positive squares in 4 ways, for example, as 237169 + 50808384 = 487^2 + 7128^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51045553 - 2¹ = 51045551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51045551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9100 + ... + 13597.

It is an arithmetic number, because the mean of its divisors is an integer number (6911541).

Almost surely, 2^51045553 is an apocalyptic number.

It is an amenable number.

51045553 is a deficient number, since it is larger than the sum of its proper divisors (4246775).

51045553 is a wasteful number, since it uses less digits than its factorization.

51045553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22883.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 51045553 is about 7144.6170646158. The cubic root of 51045553 is about 370.9533559007.

Adding to 51045553 its reverse (35554015), we get a palindrome (86599568).

The spelling of 51045553 in words is "fifty-one million, forty-five thousand, five hundred fifty-three".