31200043431 has 8 divisors (see below), whose sum is σ = 43789534720. Its totient is φ = 19705290552.

The previous prime is 31200043409. The next prime is 31200043439. The reversal of 31200043431 is 13434000213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31200043431 - 2³⁴ = 14020174247 is a prime.

It is a super-2 number, since 2×31200043431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31200043398 and 31200043407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31200043439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273684535 + ... + 273684648.

It is an arithmetic number, because the mean of its divisors is an integer number (5473691840).

Almost surely, 2^31200043431 is an apocalyptic number.

31200043431 is a deficient number, since it is larger than the sum of its proper divisors (12589491289).

31200043431 is a wasteful number, since it uses less digits than its factorization.

31200043431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547369205.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31200043431 its reverse (13434000213), we get a palindrome (44634043644).

The spelling of 31200043431 in words is "thirty-one billion, two hundred million, forty-three thousand, four hundred thirty-one".