51342243 has 4 divisors (see below), whose sum is σ = 68456328. Its totient is φ = 34228160.

The previous prime is 51342217. The next prime is 51342253. The reversal of 51342243 is 34224315.

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 51342243 - 2⁸ = 51341987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51342253) 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, 8557038 + ... + 8557043.

It is an arithmetic number, because the mean of its divisors is an integer number (17114082).

Almost surely, 2^51342243 is an apocalyptic number.

51342243 is a deficient number, since it is larger than the sum of its proper divisors (17114085).

51342243 is a wasteful number, since it uses less digits than its factorization.

51342243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17114084.

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

The square root of 51342243 is about 7165.3501659026. The cubic root of 51342243 is about 371.6706603587.

Adding to 51342243 its reverse (34224315), we get a palindrome (85566558).

The spelling of 51342243 in words is "fifty-one million, three hundred forty-two thousand, two hundred forty-three".