815486057 has 2 divisors, whose sum is σ = 815486058. Its totient is φ = 815486056.

The previous prime is 815486047. The next prime is 815486059. The reversal of 815486057 is 750684518.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 657204496 + 158281561 = 25636^2 + 12581^2 .

It is a cyclic number.

It is not a de Polignac number, because 815486057 - 2⁴ = 815486041 is a prime.

It is a super-2 number, since 2×815486057² = 1330035018322814498, which contains 22 as substring.

Together with 815486059, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 815485999 and 815486017.

It is not a weakly prime, because it can be changed into another prime (815486059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407743028 + 407743029.

It is an arithmetic number, because the mean of its divisors is an integer number (407743029).

Almost surely, 2^815486057 is an apocalyptic number.

It is an amenable number.

815486057 is a deficient number, since it is larger than the sum of its proper divisors (1).

815486057 is an equidigital number, since it uses as much as digits as its factorization.

815486057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 268800, while the sum is 44.

The square root of 815486057 is about 28556.7164954236. The cubic root of 815486057 is about 934.2695189586.

The spelling of 815486057 in words is "eight hundred fifteen million, four hundred eighty-six thousand, fifty-seven".