1225031313 has 16 divisors (see below), whose sum is σ = 1859337216. Its totient is φ = 710162640.

The previous prime is 1225031303. The next prime is 1225031321. The reversal of 1225031313 is 3131305221.

It is not a de Polignac number, because 1225031313 - 2⁵ = 1225031281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1225031313.

It is not an unprimeable number, because it can be changed into a prime (1225031303) 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 15 ways as a sum of consecutive naturals, for example, 806245 + ... + 807762.

It is an arithmetic number, because the mean of its divisors is an integer number (116208576).

Almost surely, 2^1225031313 is an apocalyptic number.

It is an amenable number.

1225031313 is a deficient number, since it is larger than the sum of its proper divisors (634305903).

1225031313 is a wasteful number, since it uses less digits than its factorization.

1225031313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614044.

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

The square root of 1225031313 is about 35000.4473257129. The cubic root of 1225031313 is about 1069.9965973630.

Adding to 1225031313 its reverse (3131305221), we get a palindrome (4356336534).

The spelling of 1225031313 in words is "one billion, two hundred twenty-five million, thirty-one thousand, three hundred thirteen".