1216055415 has 8 divisors (see below), whose sum is σ = 1945688688. Its totient is φ = 648562880.

The previous prime is 1216055371. The next prime is 1216055417. The reversal of 1216055415 is 5145506121.

1216055415 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1216055415 - 2¹⁴ = 1216039031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216055417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40535166 + ... + 40535195.

It is an arithmetic number, because the mean of its divisors is an integer number (243211086).

Almost surely, 2^1216055415 is an apocalyptic number.

1216055415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1216055415 is a deficient number, since it is larger than the sum of its proper divisors (729633273).

1216055415 is an equidigital number, since it uses as much as digits as its factorization.

1216055415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81070369.

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 1216055415 is about 34871.9861063290. The cubic root of 1216055415 is about 1067.3768730010.

The spelling of 1216055415 in words is "one billion, two hundred sixteen million, fifty-five thousand, four hundred fifteen".