264215220 has 48 divisors (see below), whose sum is σ = 757014720. Its totient is φ = 68818176.

The previous prime is 264215219. The next prime is 264215221. The reversal of 264215220 is 22512462.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (264215219) and next prime (264215221).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264215221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48625 + ... + 53784.

It is an arithmetic number, because the mean of its divisors is an integer number (15771140).

Almost surely, 2^264215220 is an apocalyptic number.

264215220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

264215220 is an abundant number, since it is smaller than the sum of its proper divisors (492799500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

264215220 is a wasteful number, since it uses less digits than its factorization.

264215220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102464 (or 102462 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 264215220 is about 16254.6983976941. The cubic root of 264215220 is about 641.6811432801.

Adding to 264215220 its reverse (22512462), we get a palindrome (286727682).

The spelling of 264215220 in words is "two hundred sixty-four million, two hundred fifteen thousand, two hundred twenty".