1225550313 has 24 divisors (see below), whose sum is σ = 1917723080. Its totient is φ = 754172640.

The previous prime is 1225550303. The next prime is 1225550317. The reversal of 1225550313 is 3130555221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 325730304 + 899820009 = 18048^2 + 29997^2 .

It is not a de Polignac number, because 1225550313 - 2²⁰ = 1224501737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1225550317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11218 + ... + 50763.

Almost surely, 2^1225550313 is an apocalyptic number.

1225550313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1225550313 is a deficient number, since it is larger than the sum of its proper divisors (692172767).

1225550313 is an equidigital number, since it uses as much as digits as its factorization.

1225550313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62026 (or 61997 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 1225550313 is about 35007.8607315557. The cubic root of 1225550313 is about 1070.1476818898.

The spelling of 1225550313 in words is "one billion, two hundred twenty-five million, five hundred fifty thousand, three hundred thirteen".