1222513145 has 32 divisors (see below), whose sum is σ = 1709683200. Its totient is φ = 821882880.

The previous prime is 1222513121. The next prime is 1222513169. The reversal of 1222513145 is 5413152221.

It is an interprime number because it is at equal distance from previous prime (1222513121) and next prime (1222513169).

It is not a de Polignac number, because 1222513145 - 2⁶ = 1222513081 is a prime.

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, 478331 + ... + 480879.

It is an arithmetic number, because the mean of its divisors is an integer number (53427600).

Almost surely, 2^1222513145 is an apocalyptic number.

It is an amenable number.

1222513145 is a deficient number, since it is larger than the sum of its proper divisors (487170055).

1222513145 is a wasteful number, since it uses less digits than its factorization.

1222513145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825.

The product of its digits is 2400, while the sum is 26.

The square root of 1222513145 is about 34964.4554512150. The cubic root of 1222513145 is about 1069.2629346140.

Adding to 1222513145 its reverse (5413152221), we get a palindrome (6635665366).

The spelling of 1222513145 in words is "one billion, two hundred twenty-two million, five hundred thirteen thousand, one hundred forty-five".