1225512163 has 4 divisors (see below), whose sum is σ = 1248635088. Its totient is φ = 1202389240.

The previous prime is 1225512161. The next prime is 1225512191. The reversal of 1225512163 is 3612155221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3612155221 = 23 ⋅157050227.

It is a cyclic number.

It is not a de Polignac number, because 1225512163 - 2¹ = 1225512161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225512161) 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, 11561383 + ... + 11561488.

It is an arithmetic number, because the mean of its divisors is an integer number (312158772).

Almost surely, 2^1225512163 is an apocalyptic number.

1225512163 is a deficient number, since it is larger than the sum of its proper divisors (23122925).

1225512163 is an equidigital number, since it uses as much as digits as its factorization.

1225512163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23122924.

The product of its digits is 3600, while the sum is 28.

The square root of 1225512163 is about 35007.3158496906. The cubic root of 1225512163 is about 1070.1365776108.

Adding to 1225512163 its reverse (3612155221), we get a palindrome (4837667384).

The spelling of 1225512163 in words is "one billion, two hundred twenty-five million, five hundred twelve thousand, one hundred sixty-three".