51223443 has 16 divisors (see below), whose sum is σ = 70286976. Its totient is φ = 33168960.

The previous prime is 51223433. The next prime is 51223451. The reversal of 51223443 is 34432215.

It is not a de Polignac number, because 51223443 - 2⁴ = 51223427 is a prime.

It is a super-2 number, since 2×51223443² = 5247682225548498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51223423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12928 + ... + 16418.

It is an arithmetic number, because the mean of its divisors is an integer number (4392936).

Almost surely, 2^51223443 is an apocalyptic number.

51223443 is a deficient number, since it is larger than the sum of its proper divisors (19063533).

51223443 is a wasteful number, since it uses less digits than its factorization.

51223443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3634.

The product of its digits is 2880, while the sum is 24.

The square root of 51223443 is about 7157.0554699541. The cubic root of 51223443 is about 371.3837713577.

Adding to 51223443 its reverse (34432215), we get a palindrome (85655658).

The spelling of 51223443 in words is "fifty-one million, two hundred twenty-three thousand, four hundred forty-three".