1222501656 has 16 divisors (see below), whose sum is σ = 3056254200. Its totient is φ = 407500544.

The previous prime is 1222501649. The next prime is 1222501663. The reversal of 1222501656 is 6561052221.

It is an interprime number because it is at equal distance from previous prime (1222501649) and next prime (1222501663).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25468761 + ... + 25468808.

Almost surely, 2^1222501656 is an apocalyptic number.

It is an amenable number.

1222501656 is an abundant number, since it is smaller than the sum of its proper divisors (1833752544).

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

1222501656 is a wasteful number, since it uses less digits than its factorization.

1222501656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50937578 (or 50937574 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1222501656 is about 34964.2911554060. The cubic root of 1222501656 is about 1069.2595850112.

Adding to 1222501656 its reverse (6561052221), we get a palindrome (7783553877).

The spelling of 1222501656 in words is "one billion, two hundred twenty-two million, five hundred one thousand, six hundred fifty-six".