1225559016 has 48 divisors (see below), whose sum is σ = 3620972160. Its totient is φ = 371381280.

The previous prime is 1225559011. The next prime is 1225559047. The reversal of 1225559016 is 6109555221.

1225559016 is a `hidden beast` number, since 1 + 2 + 2 + 55 + 590 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1225559011) 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 11 ways as a sum of consecutive naturals, for example, 772920 + ... + 774503.

It is an arithmetic number, because the mean of its divisors is an integer number (75436920).

Almost surely, 2^1225559016 is an apocalyptic number.

It is an amenable number.

1225559016 is an abundant number, since it is smaller than the sum of its proper divisors (2395413144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225559016 is a wasteful number, since it uses less digits than its factorization.

1225559016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547446 (or 1547439 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1225559016 is about 35007.9850319895. The cubic root of 1225559016 is about 1070.1502150302.

The spelling of 1225559016 in words is "one billion, two hundred twenty-five million, five hundred fifty-nine thousand, sixteen".