1223522445 has 32 divisors (see below), whose sum is σ = 2005585920. Its totient is φ = 636733440.

The previous prime is 1223522431. The next prime is 1223522479. The reversal of 1223522445 is 5442253221.

1223522445 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1223522445 - 2⁴ = 1223522429 is a prime.

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, 110941 + ... + 121469.

It is an arithmetic number, because the mean of its divisors is an integer number (62674560).

Almost surely, 2^1223522445 is an apocalyptic number.

1223522445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1223522445 is a deficient number, since it is larger than the sum of its proper divisors (782063475).

1223522445 is a wasteful number, since it uses less digits than its factorization.

1223522445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10725.

The product of its digits is 19200, while the sum is 30.

The square root of 1223522445 is about 34978.8857026635. The cubic root of 1223522445 is about 1069.5571128333.

Adding to 1223522445 its reverse (5442253221), we get a palindrome (6665775666).

The spelling of 1223522445 in words is "one billion, two hundred twenty-three million, five hundred twenty-two thousand, four hundred forty-five".