31423223031 has 8 divisors (see below), whose sum is σ = 42227533824. Its totient is φ = 20783863800.

The previous prime is 31423223003. The next prime is 31423223071. The reversal of 31423223031 is 13032232413.

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

It is not a de Polignac number, because 31423223031 - 2¹⁹ = 31422698743 is a prime.

It is a super-2 number, since 2×31423223031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31423222992 and 31423223010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31423223071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41237445 + ... + 41238206.

It is an arithmetic number, because the mean of its divisors is an integer number (5278441728).

Almost surely, 2^31423223031 is an apocalyptic number.

31423223031 is a deficient number, since it is larger than the sum of its proper divisors (10804310793).

31423223031 is a wasteful number, since it uses less digits than its factorization.

31423223031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82475781.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 31423223031 its reverse (13032232413), we get a palindrome (44455455444).

The spelling of 31423223031 in words is "thirty-one billion, four hundred twenty-three million, two hundred twenty-three thousand, thirty-one".