31231134231 has 16 divisors (see below), whose sum is σ = 48099287808. Its totient is φ = 17814550400.

The previous prime is 31231134217. The next prime is 31231134257. The reversal of 31231134231 is 13243113213.

It is a cyclic number.

It is not a de Polignac number, because 31231134231 - 2¹⁵ = 31231101463 is a prime.

It is a super-3 number, since 3×31231134231³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231134031) 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, 27834675 + ... + 27835796.

It is an arithmetic number, because the mean of its divisors is an integer number (3006205488).

Almost surely, 2^31231134231 is an apocalyptic number.

31231134231 is a deficient number, since it is larger than the sum of its proper divisors (16868153577).

31231134231 is a wasteful number, since it uses less digits than its factorization.

31231134231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55670502.

The product of its digits is 1296, while the sum is 24.

Adding to 31231134231 its reverse (13243113213), we get a palindrome (44474247444).

The spelling of 31231134231 in words is "thirty-one billion, two hundred thirty-one million, one hundred thirty-four thousand, two hundred thirty-one".