1216152312 has 64 divisors (see below), whose sum is σ = 3100930560. Its totient is φ = 397392000.

The previous prime is 1216152281. The next prime is 1216152331. The reversal of 1216152312 is 2132516121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 247237 + ... + 252107.

It is an arithmetic number, because the mean of its divisors is an integer number (48452040).

Almost surely, 2^1216152312 is an apocalyptic number.

1216152312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1216152312 is an abundant number, since it is smaller than the sum of its proper divisors (1884778248).

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

1216152312 is a wasteful number, since it uses less digits than its factorization.

1216152312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5084 (or 5080 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 1216152312 is about 34873.3754030206. The cubic root of 1216152312 is about 1067.4052222765.

Adding to 1216152312 its reverse (2132516121), we get a palindrome (3348668433).

The spelling of 1216152312 in words is "one billion, two hundred sixteen million, one hundred fifty-two thousand, three hundred twelve".