3216129172 has 12 divisors (see below), whose sum is σ = 5705325556. Its totient is φ = 1586036160.

The previous prime is 3216129167. The next prime is 3216129181. The reversal of 3216129172 is 2719216123.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 630813456 + 2585315716 = 25116^2 + 50846^2 .

It is a super-3 number, since 3×3216129172³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5506779 + ... + 5507362.

Almost surely, 2^3216129172 is an apocalyptic number.

It is an amenable number.

3216129172 is a deficient number, since it is larger than the sum of its proper divisors (2489196384).

3216129172 is a wasteful number, since it uses less digits than its factorization.

3216129172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11014218 (or 11014216 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 3216129172 is about 56710.9263898942. The cubic root of 3216129172 is about 1476.0843004072.

The spelling of 3216129172 in words is "three billion, two hundred sixteen million, one hundred twenty-nine thousand, one hundred seventy-two".