1222201528 has 16 divisors (see below), whose sum is σ = 2292479280. Its totient is φ = 610873728.

The previous prime is 1222201517. The next prime is 1222201537. The reversal of 1222201528 is 8251022221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4300 + ... + 49627.

It is an arithmetic number, because the mean of its divisors is an integer number (143279955).

Almost surely, 2^1222201528 is an apocalyptic number.

It is an amenable number.

1222201528 is a deficient number, since it is larger than the sum of its proper divisors (1070277752).

1222201528 is a wasteful number, since it uses less digits than its factorization.

1222201528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56766 (or 56762 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 1222201528 is about 34959.9989702517. The cubic root of 1222201528 is about 1069.1720756529.

Adding to 1222201528 its reverse (8251022221), we get a palindrome (9473223749).

The spelling of 1222201528 in words is "one billion, two hundred twenty-two million, two hundred one thousand, five hundred twenty-eight".