51372443 has 4 divisors (see below), whose sum is σ = 51518328. Its totient is φ = 51226560.

The previous prime is 51372403. The next prime is 51372469. The reversal of 51372443 is 34427315.

It is a happy number.

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 51372443 - 2¹² = 51368347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51372403) 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, 72413 + ... + 73118.

It is an arithmetic number, because the mean of its divisors is an integer number (12879582).

Almost surely, 2^51372443 is an apocalyptic number.

51372443 is a deficient number, since it is larger than the sum of its proper divisors (145885).

51372443 is a wasteful number, since it uses less digits than its factorization.

51372443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145884.

The product of its digits is 10080, while the sum is 29.

The square root of 51372443 is about 7167.4572199630. The cubic root of 51372443 is about 371.7435194914.

Adding to 51372443 its reverse (34427315), we get a palindrome (85799758).

It can be divided in two parts, 51372 and 443, that added together give a palindrome (51815).

The spelling of 51372443 in words is "fifty-one million, three hundred seventy-two thousand, four hundred forty-three".