102223413521545 has 4 divisors (see below), whose sum is σ = 122668096225860. Its totient is φ = 81778730817232.

The previous prime is 102223413521543. The next prime is 102223413521557. The reversal of 102223413521545 is 545125314322201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31707305093776 + 70516108427769 = 5630924^2 + 8397387^2 .

It is a cyclic number.

It is not a de Polignac number, because 102223413521545 - 2¹ = 102223413521543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102223413521498 and 102223413521507.

It is not an unprimeable number, because it can be changed into a prime (102223413521543) 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, 10222341352150 + ... + 10222341352159.

It is an arithmetic number, because the mean of its divisors is an integer number (30667024056465).

Almost surely, 2^{102223413521545} is an apocalyptic number.

It is an amenable number.

102223413521545 is a deficient number, since it is larger than the sum of its proper divisors (20444682704315).

102223413521545 is an equidigital number, since it uses as much as digits as its factorization.

102223413521545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20444682704314.

The product of its (nonzero) digits is 288000, while the sum is 40.

Adding to 102223413521545 its reverse (545125314322201), we get a palindrome (647348727843746).

The spelling of 102223413521545 in words is "one hundred two trillion, two hundred twenty-three billion, four hundred thirteen million, five hundred twenty-one thousand, five hundred forty-five".