31003234421 has 4 divisors (see below), whose sum is σ = 32072311500. Its totient is φ = 29934157344.

The previous prime is 31003234357. The next prime is 31003234429. The reversal of 31003234421 is 12443230013.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18554253796 + 12448980625 = 136214^2 + 111575^2 .

It is a cyclic number.

It is not a de Polignac number, because 31003234421 - 2⁶ = 31003234357 is a prime.

It is a super-2 number, since 2×31003234421² (a number of 22 digits) contains 22 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 (31003234429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534538496 + ... + 534538553.

It is an arithmetic number, because the mean of its divisors is an integer number (8018077875).

Almost surely, 2^31003234421 is an apocalyptic number.

It is an amenable number.

31003234421 is a deficient number, since it is larger than the sum of its proper divisors (1069077079).

31003234421 is a wasteful number, since it uses less digits than its factorization.

31003234421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069077078.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31003234421 its reverse (12443230013), we get a palindrome (43446464434).

The spelling of 31003234421 in words is "thirty-one billion, three million, two hundred thirty-four thousand, four hundred twenty-one".