51244423 has 4 divisors (see below), whose sum is σ = 51268408. Its totient is φ = 51220440.

The previous prime is 51244399. The next prime is 51244447. The reversal of 51244423 is 32444215.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (51244399) and next prime (51244447).

It is a cyclic number.

It is not a de Polignac number, because 51244423 - 2⁹ = 51243911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51244493) 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, 8436 + ... + 13177.

It is an arithmetic number, because the mean of its divisors is an integer number (12817102).

Almost surely, 2^51244423 is an apocalyptic number.

51244423 is a deficient number, since it is larger than the sum of its proper divisors (23985).

51244423 is a wasteful number, since it uses less digits than its factorization.

51244423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23984.

The product of its digits is 3840, while the sum is 25.

The square root of 51244423 is about 7158.5210064650. The cubic root of 51244423 is about 371.4344679889.

Adding to 51244423 its reverse (32444215), we get a palindrome (83688638).

The spelling of 51244423 in words is "fifty-one million, two hundred forty-four thousand, four hundred twenty-three".