1216215032 has 8 divisors (see below), whose sum is σ = 2280403200. Its totient is φ = 608107512.

The previous prime is 1216214981. The next prime is 1216215041. The reversal of 1216215032 is 2305126121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1216215032² = 2958358008125522048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1216214989 and 1216215007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76013432 + ... + 76013447.

It is an arithmetic number, because the mean of its divisors is an integer number (285050400).

Almost surely, 2^1216215032 is an apocalyptic number.

It is an amenable number.

1216215032 is a deficient number, since it is larger than the sum of its proper divisors (1064188168).

1216215032 is a wasteful number, since it uses less digits than its factorization.

1216215032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152026885 (or 152026881 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1216215032 is about 34874.2746447865. The cubic root of 1216215032 is about 1067.4235715419.

The spelling of 1216215032 in words is "one billion, two hundred sixteen million, two hundred fifteen thousand, thirty-two".