31000232231 has 16 divisors (see below), whose sum is σ = 31577364000. Its totient is φ = 30429431808.

The previous prime is 31000232227. The next prime is 31000232233. The reversal of 31000232231 is 13223200013.

It is a cyclic number.

It is not a de Polignac number, because 31000232231 - 2² = 31000232227 is a prime.

It is a super-2 number, since 2×31000232231² (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 (31000232233) 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, 6077120 + ... + 6082218.

It is an arithmetic number, because the mean of its divisors is an integer number (1973585250).

Almost surely, 2^31000232231 is an apocalyptic number.

31000232231 is a deficient number, since it is larger than the sum of its proper divisors (577131769).

31000232231 is a wasteful number, since it uses less digits than its factorization.

31000232231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5698.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31000232231 its reverse (13223200013), we get a palindrome (44223432244).

The spelling of 31000232231 in words is "thirty-one billion, two hundred thirty-two thousand, two hundred thirty-one".