1222515144 has 48 divisors (see below), whose sum is σ = 3314695020. Its totient is φ = 407047680.

The previous prime is 1222515143. The next prime is 1222515149. The reversal of 1222515144 is 4415152221.

It is a happy number.

1222515144 is a `hidden beast` number, since 1 + 2 + 2 + 2 + 515 + 144 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1075184100 + 147331044 = 32790^2 + 12138^2 .

It is not an unprimeable number, because it can be changed into a prime (1222515143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58404 + ... + 76524.

Almost surely, 2^1222515144 is an apocalyptic number.

It is an amenable number.

1222515144 is an abundant number, since it is smaller than the sum of its proper divisors (2092179876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222515144 is a wasteful number, since it uses less digits than its factorization.

1222515144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19070 (or 19063 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 1222515144 is about 34964.4840373771. The cubic root of 1222515144 is about 1069.2635174176.

Adding to 1222515144 its reverse (4415152221), we get a palindrome (5637667365).

The spelling of 1222515144 in words is "one billion, two hundred twenty-two million, five hundred fifteen thousand, one hundred forty-four".