31204233421 has 8 divisors (see below), whose sum is σ = 33030946080. Its totient is φ = 29427567792.

The previous prime is 31204233419. The next prime is 31204233433. The reversal of 31204233421 is 12433240213.

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

It is a cyclic number.

It is not a de Polignac number, because 31204233421 - 2¹ = 31204233419 is a prime.

It is a super-3 number, since 3×31204233421³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31204233451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12510475 + ... + 12512968.

It is an arithmetic number, because the mean of its divisors is an integer number (4128868260).

Almost surely, 2^31204233421 is an apocalyptic number.

It is an amenable number.

31204233421 is a deficient number, since it is larger than the sum of its proper divisors (1826712659).

31204233421 is a wasteful number, since it uses less digits than its factorization.

31204233421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25023515.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31204233421 its reverse (12433240213), we get a palindrome (43637473634).

The spelling of 31204233421 in words is "thirty-one billion, two hundred four million, two hundred thirty-three thousand, four hundred twenty-one".