465205681 has 2 divisors, whose sum is σ = 465205682. Its totient is φ = 465205680.

The previous prime is 465205679. The next prime is 465205717. The reversal of 465205681 is 186502564.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 423989281 + 41216400 = 20591^2 + 6420^2 .

It is a cyclic number.

It is not a de Polignac number, because 465205681 - 2¹ = 465205679 is a prime.

It is a super-2 number, since 2×465205681² = 432832651269347522, which contains 22 as substring.

Together with 465205679, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 465205681.

It is not a weakly prime, because it can be changed into another prime (465209681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 232602840 + 232602841.

It is an arithmetic number, because the mean of its divisors is an integer number (232602841).

Almost surely, 2^465205681 is an apocalyptic number.

It is an amenable number.

465205681 is a deficient number, since it is larger than the sum of its proper divisors (1).

465205681 is an equidigital number, since it uses as much as digits as its factorization.

465205681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 465205681 is about 21568.6272395811. The cubic root of 465205681 is about 774.8453002355.

The spelling of 465205681 in words is "four hundred sixty-five million, two hundred five thousand, six hundred eighty-one".