1222241640 has 64 divisors (see below), whose sum is σ = 3728894400. Its totient is φ = 320404992.

The previous prime is 1222241599. The next prime is 1222241651. The reversal of 1222241640 is 461422221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1222241640.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79237 + ... + 93396.

It is an arithmetic number, because the mean of its divisors is an integer number (58263975).

Almost surely, 2^1222241640 is an apocalyptic number.

1222241640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222241640 is an abundant number, since it is smaller than the sum of its proper divisors (2506652760).

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

1222241640 is a wasteful number, since it uses less digits than its factorization.

1222241640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172706 (or 172702 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 1222241640 is about 34960.5726497722. The cubic root of 1222241640 is about 1069.1837720767.

Adding to 1222241640 its reverse (461422221), we get a palindrome (1683663861).

The spelling of 1222241640 in words is "one billion, two hundred twenty-two million, two hundred forty-one thousand, six hundred forty".