815551463 has 2 divisors, whose sum is σ = 815551464. Its totient is φ = 815551462.

The previous prime is 815551417. The next prime is 815551483. The reversal of 815551463 is 364155518.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 815551463 - 2¹⁴ = 815535079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (815551483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407775731 + 407775732.

It is an arithmetic number, because the mean of its divisors is an integer number (407775732).

Almost surely, 2^815551463 is an apocalyptic number.

815551463 is a deficient number, since it is larger than the sum of its proper divisors (1).

815551463 is an equidigital number, since it uses as much as digits as its factorization.

815551463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72000, while the sum is 38.

The square root of 815551463 is about 28557.8616671487. The cubic root of 815551463 is about 934.2944959638.

The spelling of 815551463 in words is "eight hundred fifteen million, five hundred fifty-one thousand, four hundred sixty-three".