3131333421 has 16 divisors (see below), whose sum is σ = 4290204864. Its totient is φ = 2030068224.

The previous prime is 3131333407. The next prime is 3131333431. The reversal of 3131333421 is 1243331313.

It is a happy number.

It is not a de Polignac number, because 3131333421 - 2¹¹ = 3131331373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3131333391 and 3131333400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131333431) 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 15 ways as a sum of consecutive naturals, for example, 242685 + ... + 255261.

It is an arithmetic number, because the mean of its divisors is an integer number (268137804).

Almost surely, 2^3131333421 is an apocalyptic number.

It is an amenable number.

3131333421 is a deficient number, since it is larger than the sum of its proper divisors (1158871443).

3131333421 is a wasteful number, since it uses less digits than its factorization.

3131333421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14860.

The product of its digits is 1944, while the sum is 24.

The square root of 3131333421 is about 55958.3186041182. The cubic root of 3131333421 is about 1462.9958844987.

Adding to 3131333421 its reverse (1243331313), we get a palindrome (4374664734).

The spelling of 3131333421 in words is "three billion, one hundred thirty-one million, three hundred thirty-three thousand, four hundred twenty-one".