1213225316 has 12 divisors (see below), whose sum is σ = 2234888880. Its totient is φ = 574685640.

The previous prime is 1213225303. The next prime is 1213225327. The reversal of 1213225316 is 6135223121.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7981670 + ... + 7981821.

It is an arithmetic number, because the mean of its divisors is an integer number (186240740).

Almost surely, 2^1213225316 is an apocalyptic number.

It is an amenable number.

1213225316 is a deficient number, since it is larger than the sum of its proper divisors (1021663564).

1213225316 is a wasteful number, since it uses less digits than its factorization.

1213225316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15963514 (or 15963512 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 1213225316 is about 34831.3840666718. The cubic root of 1213225316 is about 1066.5482022518.

Adding to 1213225316 its reverse (6135223121), we get a palindrome (7348448437).

The spelling of 1213225316 in words is "one billion, two hundred thirteen million, two hundred twenty-five thousand, three hundred sixteen".