31200234031 has 4 divisors (see below), whose sum is σ = 32276104200. Its totient is φ = 30124363864.

The previous prime is 31200234019. The next prime is 31200234047. The reversal of 31200234031 is 13043200213.

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

It is a cyclic number.

It is not a de Polignac number, because 31200234031 - 2⁷ = 31200233903 is a prime.

It is a super-2 number, since 2×31200234031² (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 (31200234071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537935041 + ... + 537935098.

It is an arithmetic number, because the mean of its divisors is an integer number (8069026050).

Almost surely, 2^31200234031 is an apocalyptic number.

31200234031 is a deficient number, since it is larger than the sum of its proper divisors (1075870169).

31200234031 is a wasteful number, since it uses less digits than its factorization.

31200234031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075870168.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 31200234031 its reverse (13043200213), we get a palindrome (44243434244).

The spelling of 31200234031 in words is "thirty-one billion, two hundred million, two hundred thirty-four thousand, thirty-one".