221513326344136 has 16 divisors (see below), whose sum is σ = 415360199341440. Its totient is φ = 110750606519760.

The previous prime is 221513326344133. The next prime is 221513326344227. The reversal of 221513326344136 is 631443623315122.

221513326344136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221513326344136² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221513326344133) 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, 756926100 + ... + 757218691.

It is an arithmetic number, because the mean of its divisors is an integer number (25960012458840).

Almost surely, 2^{221513326344136} is an apocalyptic number.

It is an amenable number.

221513326344136 is a deficient number, since it is larger than the sum of its proper divisors (193846872997304).

221513326344136 is a wasteful number, since it uses less digits than its factorization.

221513326344136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514163084 (or 1514163080 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 46.

Adding to 221513326344136 its reverse (631443623315122), we get a palindrome (852956949659258).

The spelling of 221513326344136 in words is "two hundred twenty-one trillion, five hundred thirteen billion, three hundred twenty-six million, three hundred forty-four thousand, one hundred thirty-six".