51245911 has 2 divisors, whose sum is σ = 51245912. Its totient is φ = 51245910.

The previous prime is 51245893. The next prime is 51245921. The reversal of 51245911 is 11954215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51245911 - 2⁵ = 51245879 is a prime.

It is a super-2 number, since 2×51245911² = 5252286788439842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51245911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51245921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25622955 + 25622956.

It is an arithmetic number, because the mean of its divisors is an integer number (25622956).

Almost surely, 2^51245911 is an apocalyptic number.

51245911 is a deficient number, since it is larger than the sum of its proper divisors (1).

51245911 is an equidigital number, since it uses as much as digits as its factorization.

51245911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 28.

The square root of 51245911 is about 7158.6249377936. The cubic root of 51245911 is about 371.4380631063.

The spelling of 51245911 in words is "fifty-one million, two hundred forty-five thousand, nine hundred eleven".