3131232021 has 24 divisors (see below), whose sum is σ = 4606711200. Its totient is φ = 2049124896.

The previous prime is 3131232019. The next prime is 3131232059. The reversal of 3131232021 is 1202321313.

3131232021 is a `hidden beast` number, since 31 + 312 + 320 + 2 + 1 = 666.

It is not a de Polignac number, because 3131232021 - 2¹ = 3131232019 is a prime.

It is a super-2 number, since 2×3131232021² = 19609227938671488882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3131231985 and 3131232003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131232001) 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 23 ways as a sum of consecutive naturals, for example, 103930 + ... + 130628.

It is an arithmetic number, because the mean of its divisors is an integer number (191946300).

Almost surely, 2^3131232021 is an apocalyptic number.

It is an amenable number.

3131232021 is a deficient number, since it is larger than the sum of its proper divisors (1475479179).

3131232021 is a wasteful number, since it uses less digits than its factorization.

3131232021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26945 (or 26942 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 3131232021 is about 55957.4125652715. The cubic root of 3131232021 is about 1462.9800925698.

Adding to 3131232021 its reverse (1202321313), we get a palindrome (4333553334).

The spelling of 3131232021 in words is "three billion, one hundred thirty-one million, two hundred thirty-two thousand, twenty-one".