51133243 has 4 divisors (see below), whose sum is σ = 58438000. Its totient is φ = 43828488.

The previous prime is 51133241. The next prime is 51133279. The reversal of 51133243 is 34233115.

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 51133243 - 2¹ = 51133241 is a prime.

It is a super-2 number, since 2×51133243² = 5229217079394098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51133241) 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, 3652368 + ... + 3652381.

It is an arithmetic number, because the mean of its divisors is an integer number (14609500).

Almost surely, 2^51133243 is an apocalyptic number.

51133243 is a deficient number, since it is larger than the sum of its proper divisors (7304757).

51133243 is an equidigital number, since it uses as much as digits as its factorization.

51133243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7304756.

The product of its digits is 1080, while the sum is 22.

The square root of 51133243 is about 7150.7512192776. The cubic root of 51133243 is about 371.1656518386.

Adding to 51133243 its reverse (34233115), we get a palindrome (85366358).

The spelling of 51133243 in words is "fifty-one million, one hundred thirty-three thousand, two hundred forty-three".