816553151 has 2 divisors, whose sum is σ = 816553152. Its totient is φ = 816553150.

The previous prime is 816553141. The next prime is 816553183. The reversal of 816553151 is 151355618.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-816553151 is a prime.

It is a super-3 number, since 3×816553151³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816553141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408276575 + 408276576.

It is an arithmetic number, because the mean of its divisors is an integer number (408276576).

Almost surely, 2^816553151 is an apocalyptic number.

816553151 is a deficient number, since it is larger than the sum of its proper divisors (1).

816553151 is an equidigital number, since it uses as much as digits as its factorization.

816553151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 35.

The square root of 816553151 is about 28575.3941530121. The cubic root of 816553151 is about 934.6768502081.

It can be divided in two parts, 8165 and 53151, that added together give a palindrome (61316).

The spelling of 816553151 in words is "eight hundred sixteen million, five hundred fifty-three thousand, one hundred fifty-one".