1222157750 has 32 divisors (see below), whose sum is σ = 2495873952. Its totient is φ = 444420000.

The previous prime is 1222157747. The next prime is 1222157773. The reversal of 1222157750 is 577512221.

It is a congruent number.

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, 219461 + ... + 224960.

It is an arithmetic number, because the mean of its divisors is an integer number (77996061).

Almost surely, 2^1222157750 is an apocalyptic number.

1222157750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1222157750 is an abundant number, since it is smaller than the sum of its proper divisors (1273716202).

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

1222157750 is a wasteful number, since it uses less digits than its factorization.

1222157750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444449 (or 444439 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 1222157750 is about 34959.3728490658. The cubic root of 1222157750 is about 1069.1593099529.

Adding to 1222157750 its reverse (577512221), we get a palindrome (1799669971).

The spelling of 1222157750 in words is "one billion, two hundred twenty-two million, one hundred fifty-seven thousand, seven hundred fifty".