1225313513 has 4 divisors (see below), whose sum is σ = 1226259540. Its totient is φ = 1224367488.

The previous prime is 1225313491. The next prime is 1225313521. The reversal of 1225313513 is 3153135221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 903182809 + 322130704 = 30053^2 + 17948^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225313513 - 2²⁴ = 1208536297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225313563) 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 3 ways as a sum of consecutive naturals, for example, 471068 + ... + 473661.

It is an arithmetic number, because the mean of its divisors is an integer number (306564885).

Almost surely, 2^1225313513 is an apocalyptic number.

It is an amenable number.

1225313513 is a deficient number, since it is larger than the sum of its proper divisors (946027).

1225313513 is an equidigital number, since it uses as much as digits as its factorization.

1225313513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946026.

The product of its digits is 2700, while the sum is 26.

The square root of 1225313513 is about 35004.4784706186. The cubic root of 1225313513 is about 1070.0787530471.

Adding to 1225313513 its reverse (3153135221), we get a palindrome (4378448734).

The spelling of 1225313513 in words is "one billion, two hundred twenty-five million, three hundred thirteen thousand, five hundred thirteen".