1222513640 has 32 divisors (see below), whose sum is σ = 2783803680. Its totient is φ = 483112512.

The previous prime is 1222513631. The next prime is 1222513651. The reversal of 1222513640 is 463152221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180794 + ... + 187433.

It is an arithmetic number, because the mean of its divisors is an integer number (86993865).

Almost surely, 2^1222513640 is an apocalyptic number.

1222513640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222513640 is an abundant number, since it is smaller than the sum of its proper divisors (1561290040).

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

1222513640 is a wasteful number, since it uses less digits than its factorization.

1222513640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368321 (or 368317 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1222513640 is about 34964.4625298316. The cubic root of 1222513640 is about 1069.2630789301.

Adding to 1222513640 its reverse (463152221), we get a palindrome (1685665861).

The spelling of 1222513640 in words is "one billion, two hundred twenty-two million, five hundred thirteen thousand, six hundred forty".