815266332242 has 4 divisors (see below), whose sum is σ = 1222899498366. Its totient is φ = 407633166120.

The previous prime is 815266332229. The next prime is 815266332247. The reversal of 815266332242 is 242233662518.

It is a Cunningham number, because it is equal to 902921²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242233662518 = 2 ⋅121116831259.

It can be written as a sum of positive squares in only one way, i.e., 815266332241 + 1 = 902921^2 + 1^2 .

It is a junction number, because it is equal to n+sod(n) for n = 815266332193 and 815266332202.

It is not an unprimeable number, because it can be changed into a prime (815266332247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203816583059 + ... + 203816583062.

Almost surely, 2^815266332242 is an apocalyptic number.

815266332242 is a deficient number, since it is larger than the sum of its proper divisors (407633166124).

815266332242 is a wasteful number, since it uses less digits than its factorization.

815266332242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407633166123.

The product of its digits is 829440, while the sum is 44.

The spelling of 815266332242 in words is "eight hundred fifteen billion, two hundred sixty-six million, three hundred thirty-two thousand, two hundred forty-two".