51917611 has 2 divisors, whose sum is σ = 51917612. Its totient is φ = 51917610.

The previous prime is 51917599. The next prime is 51917617. The reversal of 51917611 is 11671915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51917611 - 2¹⁵ = 51884843 is a prime.

It is not a weakly prime, because it can be changed into another prime (51917617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25958805 + 25958806.

It is an arithmetic number, because the mean of its divisors is an integer number (25958806).

Almost surely, 2^51917611 is an apocalyptic number.

51917611 is a deficient number, since it is larger than the sum of its proper divisors (1).

51917611 is an equidigital number, since it uses as much as digits as its factorization.

51917611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1890, while the sum is 31.

The square root of 51917611 is about 7205.3876370394. The cubic root of 51917611 is about 373.0538846461.

The spelling of 51917611 in words is "fifty-one million, nine hundred seventeen thousand, six hundred eleven".