3231431021 has 8 divisors (see below), whose sum is σ = 3977145984. Its totient is φ = 2556736560.

The previous prime is 3231431011. The next prime is 3231431059. The reversal of 3231431021 is 1201341323.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3231431021 - 2²⁶ = 3164322157 is a prime.

It is a super-2 number, since 2×3231431021² = 20884292886962204882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3231430984 and 3231431002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3231431011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17755025 + ... + 17755206.

It is an arithmetic number, because the mean of its divisors is an integer number (497143248).

Almost surely, 2^3231431021 is an apocalyptic number.

It is an amenable number.

3231431021 is a deficient number, since it is larger than the sum of its proper divisors (745714963).

3231431021 is a wasteful number, since it uses less digits than its factorization.

3231431021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35510251.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 3231431021 is about 56845.6772411060. The cubic root of 3231431021 is about 1478.4215916784.

Adding to 3231431021 its reverse (1201341323), we get a palindrome (4432772344).

The spelling of 3231431021 in words is "three billion, two hundred thirty-one million, four hundred thirty-one thousand, twenty-one".