1225531330 has 32 divisors (see below), whose sum is σ = 2229875568. Its totient is φ = 484915200.

The previous prime is 1225531319. The next prime is 1225531361. The reversal of 1225531330 is 331355221.

It can be written as a sum of positive squares in 8 ways, for example, as 308107809 + 917423521 = 17553^2 + 30289^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1225531295 and 1225531304.

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 15 ways as a sum of consecutive naturals, for example, 927070 + ... + 928390.

Almost surely, 2^1225531330 is an apocalyptic number.

1225531330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1225531330 is a deficient number, since it is larger than the sum of its proper divisors (1004344238).

1225531330 is a wasteful number, since it uses less digits than its factorization.

1225531330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 1225531330 is about 35007.5896056841. The cubic root of 1225531330 is about 1070.1421565575.

Adding to 1225531330 its reverse (331355221), we get a palindrome (1556886551).

The spelling of 1225531330 in words is "one billion, two hundred twenty-five million, five hundred thirty-one thousand, three hundred thirty".