51845579 has 2 divisors, whose sum is σ = 51845580. Its totient is φ = 51845578.

The previous prime is 51845569. The next prime is 51845603. The reversal of 51845579 is 97554815.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51845579 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51845539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25922789 + 25922790.

It is an arithmetic number, because the mean of its divisors is an integer number (25922790).

Almost surely, 2^51845579 is an apocalyptic number.

51845579 is a deficient number, since it is larger than the sum of its proper divisors (1).

51845579 is an equidigital number, since it uses as much as digits as its factorization.

51845579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252000, while the sum is 44.

The square root of 51845579 is about 7200.3874201323. The cubic root of 51845579 is about 372.8812761993.

The spelling of 51845579 in words is "fifty-one million, eight hundred forty-five thousand, five hundred seventy-nine".