3721331320231 has 4 divisors (see below), whose sum is σ = 4252950080272. Its totient is φ = 3189712560192.

The previous prime is 3721331320159. The next prime is 3721331320261. The reversal of 3721331320231 is 1320231331273.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3721331320231 - 2²⁷ = 3721197102503 is a prime.

It is a super-2 number, since 2×3721331320231² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3721331320193 and 3721331320202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721331320261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265809380010 + ... + 265809380023.

It is an arithmetic number, because the mean of its divisors is an integer number (1063237520068).

Almost surely, 2^{3721331320231} is an apocalyptic number.

3721331320231 is a deficient number, since it is larger than the sum of its proper divisors (531618760041).

3721331320231 is an equidigital number, since it uses as much as digits as its factorization.

3721331320231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531618760040.

The product of its (nonzero) digits is 13608, while the sum is 31.

The spelling of 3721331320231 in words is "three trillion, seven hundred twenty-one billion, three hundred thirty-one million, three hundred twenty thousand, two hundred thirty-one".