1220225313 has 8 divisors (see below), whose sum is σ = 1666649376. Its totient is φ = 793642400.

The previous prime is 1220225311. The next prime is 1220225381. The reversal of 1220225313 is 3135220221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220225313 - 2¹ = 1220225311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220225313.

It is not an unprimeable number, because it can be changed into a prime (1220225311) 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, 4960143 + ... + 4960388.

It is an arithmetic number, because the mean of its divisors is an integer number (208331172).

Almost surely, 2^1220225313 is an apocalyptic number.

It is an amenable number.

1220225313 is a deficient number, since it is larger than the sum of its proper divisors (446424063).

1220225313 is an equidigital number, since it uses as much as digits as its factorization.

1220225313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9920575.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1220225313 is about 34931.7235904557. The cubic root of 1220225313 is about 1068.5955057826.

Adding to 1220225313 its reverse (3135220221), we get a palindrome (4355445534).

The spelling of 1220225313 in words is "one billion, two hundred twenty million, two hundred twenty-five thousand, three hundred thirteen".