815280541 has 2 divisors, whose sum is σ = 815280542. Its totient is φ = 815280540.

The previous prime is 815280511. The next prime is 815280547. The reversal of 815280541 is 145082518.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 796876441 + 18404100 = 28229^2 + 4290^2 .

It is a cyclic number.

It is not a de Polignac number, because 815280541 - 2⁹ = 815280029 is a prime.

It is equal to p_41891344 and since 815280541 and 41891344 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 815280497 and 815280506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (815280547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407640270 + 407640271.

It is an arithmetic number, because the mean of its divisors is an integer number (407640271).

Almost surely, 2^815280541 is an apocalyptic number.

It is an amenable number.

815280541 is a deficient number, since it is larger than the sum of its proper divisors (1).

815280541 is an equidigital number, since it uses as much as digits as its factorization.

815280541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12800, while the sum is 34.

The square root of 815280541 is about 28553.1178857931. The cubic root of 815280541 is about 934.1910285643.

The spelling of 815280541 in words is "eight hundred fifteen million, two hundred eighty thousand, five hundred forty-one".