1205563216 has 160 divisors (see below), whose sum is σ = 2959810560. Its totient is φ = 467596800.

The previous prime is 1205563201. The next prime is 1205563223. The reversal of 1205563216 is 6123655021.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1630975 + ... + 1631713.

It is an arithmetic number, because the mean of its divisors is an integer number (18498816).

Almost surely, 2^1205563216 is an apocalyptic number.

1205563216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1205563216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1479905280).

1205563216 is an abundant number, since it is smaller than the sum of its proper divisors (1754247344).

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

1205563216 is a wasteful number, since it uses less digits than its factorization.

1205563216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825 (or 819 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1205563216 is about 34721.2214070876. The cubic root of 1205563216 is about 1064.2982044285.

The spelling of 1205563216 in words is "one billion, two hundred five million, five hundred sixty-three thousand, two hundred sixteen".