818292481 has 4 divisors (see below), whose sum is σ = 840408532. Its totient is φ = 796176432.

The previous prime is 818292469. The next prime is 818292509. The reversal of 818292481 is 184292818.

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

It can be written as a sum of positive squares in 2 ways, for example, as 688537600 + 129754881 = 26240^2 + 11391^2 .

It is a cyclic number.

It is not a de Polignac number, because 818292481 - 2¹⁵ = 818259713 is a prime.

It is a super-2 number, since 2×818292481² = 1339205168922270722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (818292581) 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 in 3 ways as a sum of consecutive naturals, for example, 11057970 + ... + 11058043.

It is an arithmetic number, because the mean of its divisors is an integer number (210102133).

Almost surely, 2^818292481 is an apocalyptic number.

It is an amenable number.

818292481 is a deficient number, since it is larger than the sum of its proper divisors (22116051).

818292481 is a wasteful number, since it uses less digits than its factorization.

818292481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22116050.

The product of its digits is 73728, while the sum is 43.

The square root of 818292481 is about 28605.8120143442. The cubic root of 818292481 is about 935.3400275102.

The spelling of 818292481 in words is "eight hundred eighteen million, two hundred ninety-two thousand, four hundred eighty-one".