221623512063445 has 32 divisors (see below), whose sum is σ = 266915826777600. Its totient is φ = 176655223080000.

The previous prime is 221623512063439. The next prime is 221623512063479. The reversal of 221623512063445 is 544360215326122.

It is a happy number.

It is not a de Polignac number, because 221623512063445 - 2⁵ = 221623512063413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221623512063395 and 221623512063404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3273626206 + ... + 3273693904.

It is an arithmetic number, because the mean of its divisors is an integer number (8341119586800).

Almost surely, 2^{221623512063445} is an apocalyptic number.

It is an amenable number.

221623512063445 is a deficient number, since it is larger than the sum of its proper divisors (45292314714155).

221623512063445 is a wasteful number, since it uses less digits than its factorization.

221623512063445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70417.

The product of its (nonzero) digits is 2073600, while the sum is 46.

Adding to 221623512063445 its reverse (544360215326122), we get a palindrome (765983727389567).

The spelling of 221623512063445 in words is "two hundred twenty-one trillion, six hundred twenty-three billion, five hundred twelve million, sixty-three thousand, four hundred forty-five".