816055237 has 2 divisors, whose sum is σ = 816055238. Its totient is φ = 816055236.

The previous prime is 816055213. The next prime is 816055241. The reversal of 816055237 is 732550618.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 579172356 + 236882881 = 24066^2 + 15391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-816055237 is a prime.

It is a super-2 number, since 2×816055237² = 1331892299670252338, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 816055196 and 816055205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816055837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408027618 + 408027619.

It is an arithmetic number, because the mean of its divisors is an integer number (408027619).

Almost surely, 2^816055237 is an apocalyptic number.

It is an amenable number.

816055237 is a deficient number, since it is larger than the sum of its proper divisors (1).

816055237 is an equidigital number, since it uses as much as digits as its factorization.

816055237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 816055237 is about 28566.6805386975. The cubic root of 816055237 is about 934.4868306056.

The spelling of 816055237 in words is "eight hundred sixteen million, fifty-five thousand, two hundred thirty-seven".