1225502000 has 40 divisors (see below), whose sum is σ = 2963268672. Its totient is φ = 490200000.

The previous prime is 1225501997. The next prime is 1225502009. The reversal of 1225502000 is 2055221.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 1225502000.

It is not an unprimeable number, because it can be changed into a prime (1225502009) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 304376 + ... + 308375.

Almost surely, 2^1225502000 is an apocalyptic number.

1225502000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225502000 is an abundant number, since it is smaller than the sum of its proper divisors (1737766672).

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

1225502000 is an equidigital number, since it uses as much as digits as its factorization.

1225502000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612774 (or 612758 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 1225502000 is about 35007.1706940164. The cubic root of 1225502000 is about 1070.1336194386.

Adding to 1225502000 its reverse (2055221), we get a palindrome (1227557221).

The spelling of 1225502000 in words is "one billion, two hundred twenty-five million, five hundred two thousand".