264220427 has 2 divisors, whose sum is σ = 264220428. Its totient is φ = 264220426.

The previous prime is 264220399. The next prime is 264220433. The reversal of 264220427 is 724022462.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 264220427 - 2²⁰ = 263171851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 264220427.

It is not a weakly prime, because it can be changed into another prime (264220487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132110213 + 132110214.

It is an arithmetic number, because the mean of its divisors is an integer number (132110214).

Almost surely, 2^264220427 is an apocalyptic number.

264220427 is a deficient number, since it is larger than the sum of its proper divisors (1).

264220427 is an equidigital number, since it uses as much as digits as its factorization.

264220427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 264220427 is about 16254.8585659796. The cubic root of 264220427 is about 641.6853585455.

Adding to 264220427 its reverse (724022462), we get a palindrome (988242889).

The spelling of 264220427 in words is "two hundred sixty-four million, two hundred twenty thousand, four hundred twenty-seven".