1321650216 has 32 divisors (see below), whose sum is σ = 3671251200. Its totient is φ = 440550000.

The previous prime is 1321650149. The next prime is 1321650233. The reversal of 1321650216 is 6120561231.

1321650216 is a `hidden beast` number, since 1 + 3 + 2 + 1 + 650 + 2 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1321650216.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3059160 + ... + 3059591.

It is an arithmetic number, because the mean of its divisors is an integer number (114726600).

Almost surely, 2^1321650216 is an apocalyptic number.

It is an amenable number.

1321650216 is an abundant number, since it is smaller than the sum of its proper divisors (2349600984).

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

1321650216 is a wasteful number, since it uses less digits than its factorization.

1321650216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6118766 (or 6118756 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1321650216 is about 36354.5075059476. The cubic root of 1321650216 is about 1097.4182471711.

The spelling of 1321650216 in words is "one billion, three hundred twenty-one million, six hundred fifty thousand, two hundred sixteen".