31200042231 has 12 divisors (see below), whose sum is σ = 45068683608. Its totient is φ = 20799125424.

The previous prime is 31200042151. The next prime is 31200042277. The reversal of 31200042231 is 13224000213.

It is not a de Polignac number, because 31200042231 - 2¹³ = 31200034039 is a prime.

It is a super-2 number, since 2×31200042231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31200042031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 194601 + ... + 316653.

It is an arithmetic number, because the mean of its divisors is an integer number (3755723634).

Almost surely, 2^31200042231 is an apocalyptic number.

31200042231 is a deficient number, since it is larger than the sum of its proper divisors (13868641377).

31200042231 is a wasteful number, since it uses less digits than its factorization.

31200042231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150462 (or 150459 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 31200042231 its reverse (13224000213), we get a palindrome (44424042444).

The spelling of 31200042231 in words is "thirty-one billion, two hundred million, forty-two thousand, two hundred thirty-one".