31421240423 has 16 divisors (see below), whose sum is σ = 32421945600. Its totient is φ = 30436943040.

The previous prime is 31421240419. The next prime is 31421240503. The reversal of 31421240423 is 32404212413.

It is a cyclic number.

It is not a de Polignac number, because 31421240423 - 2² = 31421240419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31421240392 and 31421240401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421240923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5678168 + ... + 5683698.

It is an arithmetic number, because the mean of its divisors is an integer number (2026371600).

Almost surely, 2^31421240423 is an apocalyptic number.

31421240423 is a deficient number, since it is larger than the sum of its proper divisors (1000705177).

31421240423 is a wasteful number, since it uses less digits than its factorization.

31421240423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6982.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 31421240423 its reverse (32404212413), we get a palindrome (63825452836).

The spelling of 31421240423 in words is "thirty-one billion, four hundred twenty-one million, two hundred forty thousand, four hundred twenty-three".