31421234131423 has 4 divisors (see below), whose sum is σ = 31421254392088. Its totient is φ = 31421213870760.

The previous prime is 31421234131379. The next prime is 31421234131439. The reversal of 31421234131423 is 32413143212413.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31421234131423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421234131823) 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, 7592061 + ... + 10976422.

It is an arithmetic number, because the mean of its divisors is an integer number (7855313598022).

Almost surely, 2^{31421234131423} is an apocalyptic number.

31421234131423 is a deficient number, since it is larger than the sum of its proper divisors (20260665).

31421234131423 is a wasteful number, since it uses less digits than its factorization.

31421234131423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20260664.

The product of its digits is 41472, while the sum is 34.

Adding to 31421234131423 its reverse (32413143212413), we get a palindrome (63834377343836).

The spelling of 31421234131423 in words is "thirty-one trillion, four hundred twenty-one billion, two hundred thirty-four million, one hundred thirty-one thousand, four hundred twenty-three".