31004221343 has 16 divisors (see below), whose sum is σ = 31709314560. Its totient is φ = 30305632896.

The previous prime is 31004221331. The next prime is 31004221379. The reversal of 31004221343 is 34312240013.

It is a cyclic number.

It is not a de Polignac number, because 31004221343 - 2¹⁸ = 31003959199 is a prime.

It is a super-2 number, since 2×31004221343² (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 (31004221943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8384471 + ... + 8388167.

It is an arithmetic number, because the mean of its divisors is an integer number (1981832160).

Almost surely, 2^31004221343 is an apocalyptic number.

31004221343 is a deficient number, since it is larger than the sum of its proper divisors (705093217).

31004221343 is a wasteful number, since it uses less digits than its factorization.

31004221343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4526.

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

Adding to 31004221343 its reverse (34312240013), we get a palindrome (65316461356).

The spelling of 31004221343 in words is "thirty-one billion, four million, two hundred twenty-one thousand, three hundred forty-three".