3811321172 has 36 divisors (see below), whose sum is σ = 6931850016. Its totient is φ = 1833528480.

The previous prime is 3811321139. The next prime is 3811321177. The reversal of 3811321172 is 2711231183.

It is a super-2 number, since 2×3811321172² = 29052338152270907168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3811321177) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1044383 + ... + 1048025.

Almost surely, 2^3811321172 is an apocalyptic number.

It is an amenable number.

3811321172 is a deficient number, since it is larger than the sum of its proper divisors (3120528844).

3811321172 is a wasteful number, since it uses less digits than its factorization.

3811321172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4016 (or 3985 counting only the distinct ones).

The product of its digits is 2016, while the sum is 29.

The square root of 3811321172 is about 61735.8985680131. The cubic root of 3811321172 is about 1562.0389146333.

The spelling of 3811321172 in words is "three billion, eight hundred eleven million, three hundred twenty-one thousand, one hundred seventy-two".