1216457193 has 24 divisors (see below), whose sum is σ = 1894324320. Its totient is φ = 692328000.

The previous prime is 1216457161. The next prime is 1216457201. The reversal of 1216457193 is 3917546121.

It is not a de Polignac number, because 1216457193 - 2⁵ = 1216457161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1216457093) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 20413 + ... + 53381.

It is an arithmetic number, because the mean of its divisors is an integer number (78930180).

Almost surely, 2^1216457193 is an apocalyptic number.

It is an amenable number.

1216457193 is a deficient number, since it is larger than the sum of its proper divisors (677867127).

1216457193 is a wasteful number, since it uses less digits than its factorization.

1216457193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33237 (or 33230 counting only the distinct ones).

The product of its digits is 45360, while the sum is 39.

The square root of 1216457193 is about 34877.7463864855. The cubic root of 1216457193 is about 1067.4944118672.

The spelling of 1216457193 in words is "one billion, two hundred sixteen million, four hundred fifty-seven thousand, one hundred ninety-three".