816151 has 4 divisors (see below), whose sum is σ = 932752. Its totient is φ = 699552.

The previous prime is 816133. The next prime is 816157. The reversal of 816151 is 151618.

816151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-816151 is a prime.

It is a super-2 number, since 2×816151² = 1332204909602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58290 + ... + 58303.

It is an arithmetic number, because the mean of its divisors is an integer number (233188).

2⁸¹⁶¹⁵¹ is an apocalyptic number.

816151 is a deficient number, since it is larger than the sum of its proper divisors (116601).

816151 is a wasteful number, since it uses less digits than its factorization.

816151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116600.

The product of its digits is 240, while the sum is 22.

The square root of 816151 is about 903.4107592895. The cubic root of 816151 is about 93.4523382773.

Adding to 816151 its reverse (151618), we get a palindrome (967769).

The spelling of 816151 in words is "eight hundred sixteen thousand, one hundred fifty-one".