264218515231 has 4 divisors (see below), whose sum is σ = 288238380264. Its totient is φ = 240198650200.

The previous prime is 264218515229. The next prime is 264218515279. The reversal of 264218515231 is 132515812462.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 264218515231 - 2¹ = 264218515229 is a prime.

It is a super-2 number, since 2×264218515231² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264218515201) 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, 12009932500 + ... + 12009932521.

It is an arithmetic number, because the mean of its divisors is an integer number (72059595066).

Almost surely, 2^264218515231 is an apocalyptic number.

264218515231 is a deficient number, since it is larger than the sum of its proper divisors (24019865033).

264218515231 is a wasteful number, since it uses less digits than its factorization.

264218515231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24019865032.

The product of its digits is 115200, while the sum is 40.

The spelling of 264218515231 in words is "two hundred sixty-four billion, two hundred eighteen million, five hundred fifteen thousand, two hundred thirty-one".