1225555313 has 8 divisors (see below), whose sum is σ = 1329297480. Its totient is φ = 1125329920.

The previous prime is 1225555291. The next prime is 1225555319. The reversal of 1225555313 is 3135555221.

It can be written as a sum of positive squares in 4 ways, for example, as 404331664 + 821223649 = 20108^2 + 28657^2 .

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 1225555313 - 2⁶ = 1225555249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1225555313.

It is not an unprimeable number, because it can be changed into a prime (1225555319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 878468 + ... + 879861.

It is an arithmetic number, because the mean of its divisors is an integer number (166162185).

Almost surely, 2^1225555313 is an apocalyptic number.

It is an amenable number.

1225555313 is a deficient number, since it is larger than the sum of its proper divisors (103742167).

1225555313 is a wasteful number, since it uses less digits than its factorization.

1225555313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758387.

The product of its digits is 22500, while the sum is 32.

The square root of 1225555313 is about 35007.9321440156. The cubic root of 1225555313 is about 1070.1491372173.

The spelling of 1225555313 in words is "one billion, two hundred twenty-five million, five hundred fifty-five thousand, three hundred thirteen".