31442425231 has 4 divisors (see below), whose sum is σ = 35934200272. Its totient is φ = 26950650192.

The previous prime is 31442425229. The next prime is 31442425303. The reversal of 31442425231 is 13252424413.

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 31442425231 - 2¹ = 31442425229 is a prime.

It is a super-2 number, since 2×31442425231² (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 = 31442425193 and 31442425202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442420231) 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 3 ways as a sum of consecutive naturals, for example, 2245887510 + ... + 2245887523.

It is an arithmetic number, because the mean of its divisors is an integer number (8983550068).

Almost surely, 2^31442425231 is an apocalyptic number.

31442425231 is a deficient number, since it is larger than the sum of its proper divisors (4491775041).

31442425231 is an equidigital number, since it uses as much as digits as its factorization.

31442425231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4491775040.

The product of its digits is 23040, while the sum is 31.

Adding to 31442425231 its reverse (13252424413), we get a palindrome (44694849644).

The spelling of 31442425231 in words is "thirty-one billion, four hundred forty-two million, four hundred twenty-five thousand, two hundred thirty-one".