51553123 has 4 divisors (see below), whose sum is σ = 51569800. Its totient is φ = 51536448.

The previous prime is 51553121. The next prime is 51553147. The reversal of 51553123 is 32135515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51553123 - 2¹ = 51553121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51553121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2190 + ... + 10387.

It is an arithmetic number, because the mean of its divisors is an integer number (12892450).

Almost surely, 2^51553123 is an apocalyptic number.

51553123 is a deficient number, since it is larger than the sum of its proper divisors (16677).

51553123 is a wasteful number, since it uses less digits than its factorization.

51553123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16676.

The product of its digits is 2250, while the sum is 25.

The square root of 51553123 is about 7180.0503480129. The cubic root of 51553123 is about 372.1788243984.

Adding to 51553123 its reverse (32135515), we get a palindrome (83688638).

The spelling of 51553123 in words is "fifty-one million, five hundred fifty-three thousand, one hundred twenty-three".