51002243 has 4 divisors (see below), whose sum is σ = 52380720. Its totient is φ = 49623768.

The previous prime is 51002239. The next prime is 51002249. The reversal of 51002243 is 34220015.

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 51002243 - 2² = 51002239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51002249) 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, 689183 + ... + 689256.

It is an arithmetic number, because the mean of its divisors is an integer number (13095180).

Almost surely, 2^51002243 is an apocalyptic number.

51002243 is a deficient number, since it is larger than the sum of its proper divisors (1378477).

51002243 is a wasteful number, since it uses less digits than its factorization.

51002243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378476.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 51002243 is about 7141.5854682276. The cubic root of 51002243 is about 370.8484134534.

Adding to 51002243 its reverse (34220015), we get a palindrome (85222258).

The spelling of 51002243 in words is "fifty-one million, two thousand, two hundred forty-three".