1225306216 has 8 divisors (see below), whose sum is σ = 2297449170. Its totient is φ = 612653104.

The previous prime is 1225306193. The next prime is 1225306249. The reversal of 1225306216 is 6126035221.

It can be written as a sum of positive squares in only one way, i.e., 967832100 + 257474116 = 31110^2 + 16046^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76581631 + ... + 76581646.

Almost surely, 2^1225306216 is an apocalyptic number.

It is an amenable number.

1225306216 is a deficient number, since it is larger than the sum of its proper divisors (1072142954).

1225306216 is a wasteful number, since it uses less digits than its factorization.

1225306216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153163283 (or 153163279 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1225306216 is about 35004.3742409431. The cubic root of 1225306216 is about 1070.0766288615.

The spelling of 1225306216 in words is "one billion, two hundred twenty-five million, three hundred six thousand, two hundred sixteen".