264813481 has 2 divisors, whose sum is σ = 264813482. Its totient is φ = 264813480.

The previous prime is 264813473. The next prime is 264813499. The reversal of 264813481 is 184318462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190578025 + 74235456 = 13805^2 + 8616^2 .

It is a cyclic number.

It is not a de Polignac number, because 264813481 - 2³ = 264813473 is a prime.

It is a super-2 number, since 2×264813481² = 140252359438674722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 264813481.

It is not a weakly prime, because it can be changed into another prime (264813581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132406740 + 132406741.

It is an arithmetic number, because the mean of its divisors is an integer number (132406741).

Almost surely, 2^264813481 is an apocalyptic number.

It is an amenable number.

264813481 is a deficient number, since it is larger than the sum of its proper divisors (1).

264813481 is an equidigital number, since it uses as much as digits as its factorization.

264813481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 37.

The square root of 264813481 is about 16273.0907021377. The cubic root of 264813481 is about 642.1650964978.

It can be divided in two parts, 2648 and 13481, that added together give a square (16129 = 127²).

The spelling of 264813481 in words is "two hundred sixty-four million, eight hundred thirteen thousand, four hundred eighty-one".