51115443 has 8 divisors (see below), whose sum is σ = 68644800. Its totient is φ = 33831528.

The previous prime is 51115423. The next prime is 51115457. The reversal of 51115443 is 34451115.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51115443 - 2¹⁷ = 50984371 is a prime.

It is a super-2 number, since 2×51115443² = 5225577026172498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51115423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60873 + ... + 61706.

It is an arithmetic number, because the mean of its divisors is an integer number (8580600).

Almost surely, 2^51115443 is an apocalyptic number.

51115443 is a deficient number, since it is larger than the sum of its proper divisors (17529357).

51115443 is a wasteful number, since it uses less digits than its factorization.

51115443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122721.

The product of its digits is 1200, while the sum is 24.

The square root of 51115443 is about 7149.5064864646. The cubic root of 51115443 is about 371.1225779986.

Adding to 51115443 its reverse (34451115), we get a palindrome (85566558).

The spelling of 51115443 in words is "fifty-one million, one hundred fifteen thousand, four hundred forty-three".