263221143645513 has 32 divisors (see below), whose sum is σ = 359740767117312. Its totient is φ = 171096392016000.

The previous prime is 263221143645443. The next prime is 263221143645533. The reversal of 263221143645513 is 315546341122362.

It is not a de Polignac number, because 263221143645513 - 2¹⁸ = 263221143383369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (263221143645533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1382608456 + ... + 1382798822.

It is an arithmetic number, because the mean of its divisors is an integer number (11241898972416).

Almost surely, 2^{263221143645513} is an apocalyptic number.

It is an amenable number.

263221143645513 is a deficient number, since it is larger than the sum of its proper divisors (96519623471799).

263221143645513 is a wasteful number, since it uses less digits than its factorization.

263221143645513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197205.

The product of its digits is 3110400, while the sum is 48.

Adding to 263221143645513 its reverse (315546341122362), we get a palindrome (578767484767875).

The spelling of 263221143645513 in words is "two hundred sixty-three trillion, two hundred twenty-one billion, one hundred forty-three million, six hundred forty-five thousand, five hundred thirteen".