1216301852 has 12 divisors (see below), whose sum is σ = 2158508016. Its totient is φ = 599585280.

The previous prime is 1216301809. The next prime is 1216301869. The reversal of 1216301852 is 2581036121.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2141093 + ... + 2141660.

It is an arithmetic number, because the mean of its divisors is an integer number (179875668).

Almost surely, 2^1216301852 is an apocalyptic number.

It is an amenable number.

1216301852 is a deficient number, since it is larger than the sum of its proper divisors (942206164).

1216301852 is a wasteful number, since it uses less digits than its factorization.

1216301852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4282828 (or 4282826 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 1216301852 is about 34875.5193796451. The cubic root of 1216301852 is about 1067.4489704247.

Adding to 1216301852 its reverse (2581036121), we get a palindrome (3797337973).

The spelling of 1216301852 in words is "one billion, two hundred sixteen million, three hundred one thousand, eight hundred fifty-two".