260815481 has 2 divisors, whose sum is σ = 260815482. Its totient is φ = 260815480.

The previous prime is 260815453. The next prime is 260815483. The reversal of 260815481 is 184518062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218448400 + 42367081 = 14780^2 + 6509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260815481 is a prime.

It is a super-2 number, since 2×260815481² = 136049430258522722, which contains 22 as substring.

Together with 260815483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (260815483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130407740 + 130407741.

It is an arithmetic number, because the mean of its divisors is an integer number (130407741).

Almost surely, 2^260815481 is an apocalyptic number.

It is an amenable number.

260815481 is a deficient number, since it is larger than the sum of its proper divisors (1).

260815481 is an equidigital number, since it uses as much as digits as its factorization.

260815481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 260815481 is about 16149.7826920364. The cubic root of 260815481 is about 638.9170169219.

The spelling of 260815481 in words is "two hundred sixty million, eight hundred fifteen thousand, four hundred eighty-one".