1222540144 has 40 divisors (see below), whose sum is σ = 2711397888. Its totient is φ = 523104960.

The previous prime is 1222540141. The next prime is 1222540157. The reversal of 1222540144 is 4410452221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222540141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64029 + ... + 80899.

Almost surely, 2^1222540144 is an apocalyptic number.

1222540144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1222540144 is an abundant number, since it is smaller than the sum of its proper divisors (1488857744).

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

1222540144 is a wasteful number, since it uses less digits than its factorization.

1222540144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17533 (or 17527 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 1222540144 is about 34964.8415411825. The cubic root of 1222540144 is about 1069.2708060542.

Adding to 1222540144 its reverse (4410452221), we get a palindrome (5632992365).

The spelling of 1222540144 in words is "one billion, two hundred twenty-two million, five hundred forty thousand, one hundred forty-four".