1216451334 has 32 divisors (see below), whose sum is σ = 2781849600. Its totient is φ = 347383872.

The previous prime is 1216451333. The next prime is 1216451351. The reversal of 1216451334 is 4331546121.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216451333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94722 + ... + 106794.

It is an arithmetic number, because the mean of its divisors is an integer number (86932800).

Almost surely, 2^1216451334 is an apocalyptic number.

1216451334 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1216451334 is an abundant number, since it is smaller than the sum of its proper divisors (1565398266).

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

1216451334 is a wasteful number, since it uses less digits than its factorization.

1216451334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14484.

The product of its digits is 8640, while the sum is 30.

The square root of 1216451334 is about 34877.6623929988. The cubic root of 1216451334 is about 1067.4926980215.

Adding to 1216451334 its reverse (4331546121), we get a palindrome (5547997455).

The spelling of 1216451334 in words is "one billion, two hundred sixteen million, four hundred fifty-one thousand, three hundred thirty-four".