264021413 has 4 divisors (see below), whose sum is σ = 264331788. Its totient is φ = 263711040.

The previous prime is 264021403. The next prime is 264021431. The reversal of 264021413 is 314120462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 314120462 = 2 ⋅157060231.

It can be written as a sum of positive squares in 2 ways, for example, as 60730849 + 203290564 = 7793^2 + 14258^2 .

It is a cyclic number.

It is not a de Polignac number, because 264021413 - 2⁶ = 264021349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264021403) 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 in 3 ways as a sum of consecutive naturals, for example, 153908 + ... + 155613.

It is an arithmetic number, because the mean of its divisors is an integer number (66082947).

Almost surely, 2^264021413 is an apocalyptic number.

It is an amenable number.

264021413 is a deficient number, since it is larger than the sum of its proper divisors (310375).

264021413 is an equidigital number, since it uses as much as digits as its factorization.

264021413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310374.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 264021413 is about 16248.7357354349. The cubic root of 264021413 is about 641.5242097052.

Adding to 264021413 its reverse (314120462), we get a palindrome (578141875).

The spelling of 264021413 in words is "two hundred sixty-four million, twenty-one thousand, four hundred thirteen".