1225313013 has 4 divisors (see below), whose sum is σ = 1633750688. Its totient is φ = 816875340.

The previous prime is 1225312997. The next prime is 1225313027. The reversal of 1225313013 is 3103135221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1225313013 - 2⁴ = 1225312997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225313213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204218833 + ... + 204218838.

It is an arithmetic number, because the mean of its divisors is an integer number (408437672).

Almost surely, 2^1225313013 is an apocalyptic number.

It is an amenable number.

1225313013 is a deficient number, since it is larger than the sum of its proper divisors (408437675).

1225313013 is an equidigital number, since it uses as much as digits as its factorization.

1225313013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408437674.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1225313013 is about 35004.4713286746. The cubic root of 1225313013 is about 1070.0786074954.

Adding to 1225313013 its reverse (3103135221), we get a palindrome (4328448234).

It can be divided in two parts, 122 and 5313013, that added together give a palindrome (5313135).

The spelling of 1225313013 in words is "one billion, two hundred twenty-five million, three hundred thirteen thousand, thirteen".