815384233 has 2 divisors, whose sum is σ = 815384234. Its totient is φ = 815384232.

The previous prime is 815384197. The next prime is 815384239. The reversal of 815384233 is 332483518.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 745945344 + 69438889 = 27312^2 + 8333^2 .

It is a cyclic number.

It is not a de Polignac number, because 815384233 - 2⁹ = 815383721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 815384192 and 815384201.

It is not a weakly prime, because it can be changed into another prime (815384239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407692116 + 407692117.

It is an arithmetic number, because the mean of its divisors is an integer number (407692117).

Almost surely, 2^815384233 is an apocalyptic number.

It is an amenable number.

815384233 is a deficient number, since it is larger than the sum of its proper divisors (1).

815384233 is an equidigital number, since it uses as much as digits as its factorization.

815384233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 37.

The square root of 815384233 is about 28554.9336017438. The cubic root of 815384233 is about 934.2306321219.

The spelling of 815384233 in words is "eight hundred fifteen million, three hundred eighty-four thousand, two hundred thirty-three".