264497881 has 4 divisors (see below), whose sum is σ = 265126564. Its totient is φ = 263869200.

The previous prime is 264497873. The next prime is 264497927. The reversal of 264497881 is 188794462.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7376656 + 257121225 = 2716^2 + 16035^2 .

It is a cyclic number.

It is not a de Polignac number, because 264497881 - 2³ = 264497873 is a prime.

It is a super-2 number, since 2×264497881² = 139918258106980322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264497801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313710 + ... + 314551.

It is an arithmetic number, because the mean of its divisors is an integer number (66281641).

Almost surely, 2^264497881 is an apocalyptic number.

It is an amenable number.

264497881 is a deficient number, since it is larger than the sum of its proper divisors (628683).

264497881 is an equidigital number, since it uses as much as digits as its factorization.

264497881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628682.

The product of its digits is 774144, while the sum is 49.

The square root of 264497881 is about 16263.3908211049. The cubic root of 264497881 is about 641.9098881039.

The spelling of 264497881 in words is "two hundred sixty-four million, four hundred ninety-seven thousand, eight hundred eighty-one".