264820281 has 8 divisors (see below), whose sum is σ = 385193184. Its totient is φ = 160497120.

The previous prime is 264820279. The next prime is 264820307. The reversal of 264820281 is 182028462.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 264820281 - 2¹ = 264820279 is a prime.

It is a super-2 number, since 2×264820281² = 140259562457837922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 8024857 = 264820281 / (2 + 6 + 4 + 8 + 2 + 0 + 2 + 8 + 1).

It is not an unprimeable number, because it can be changed into a prime (264820481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4012396 + ... + 4012461.

It is an arithmetic number, because the mean of its divisors is an integer number (48149148).

Almost surely, 2^264820281 is an apocalyptic number.

It is an amenable number.

264820281 is a deficient number, since it is larger than the sum of its proper divisors (120372903).

264820281 is a wasteful number, since it uses less digits than its factorization.

264820281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8024871.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 264820281 is about 16273.2996346777. The cubic root of 264820281 is about 642.1705930524.

The spelling of 264820281 in words is "two hundred sixty-four million, eight hundred twenty thousand, two hundred eighty-one".