1216043250 has 32 divisors (see below), whose sum is σ = 3035245824. Its totient is φ = 324278000.

The previous prime is 1216043237. The next prime is 1216043261. The reversal of 1216043250 is 523406121.

1216043250 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1216043250² = 2957522371741125000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1216043250.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 809946 + ... + 811445.

It is an arithmetic number, because the mean of its divisors is an integer number (94851432).

Almost surely, 2^1216043250 is an apocalyptic number.

1216043250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216043250 is an abundant number, since it is smaller than the sum of its proper divisors (1819202574).

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

1216043250 is a wasteful number, since it uses less digits than its factorization.

1216043250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621411 (or 1621401 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1216043250 is about 34871.8116822169. The cubic root of 1216043250 is about 1067.3733137654.

Adding to 1216043250 its reverse (523406121), we get a palindrome (1739449371).

The spelling of 1216043250 in words is "one billion, two hundred sixteen million, forty-three thousand, two hundred fifty".