51745233 has 4 divisors (see below), whose sum is σ = 68993648. Its totient is φ = 34496820.

The previous prime is 51745219. The next prime is 51745259. The reversal of 51745233 is 33254715.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51745233 - 2⁴ = 51745217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51745233.

It is not an unprimeable number, because it can be changed into a prime (51745273) 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, 8624203 + ... + 8624208.

It is an arithmetic number, because the mean of its divisors is an integer number (17248412).

Almost surely, 2^51745233 is an apocalyptic number.

It is an amenable number.

51745233 is a deficient number, since it is larger than the sum of its proper divisors (17248415).

51745233 is a wasteful number, since it uses less digits than its factorization.

51745233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17248414.

The product of its digits is 12600, while the sum is 30.

The square root of 51745233 is about 7193.4159479346. The cubic root of 51745233 is about 372.6405529381.

Adding to 51745233 its reverse (33254715), we get a palindrome (84999948).

The spelling of 51745233 in words is "fifty-one million, seven hundred forty-five thousand, two hundred thirty-three".