31423123213 has 8 divisors (see below), whose sum is σ = 31930194240. Its totient is φ = 30917172000.

The previous prime is 31423123157. The next prime is 31423123223. The reversal of 31423123213 is 31232132413.

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

It is a cyclic number.

It is not a de Polignac number, because 31423123213 - 2²¹ = 31421026061 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 (31423123223) 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, 223288 + ... + 335713.

It is an arithmetic number, because the mean of its divisors is an integer number (3991274280).

Almost surely, 2^31423123213 is an apocalyptic number.

It is an amenable number.

31423123213 is a deficient number, since it is larger than the sum of its proper divisors (507071027).

31423123213 is an equidigital number, since it uses as much as digits as its factorization.

31423123213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559907.

The product of its digits is 2592, while the sum is 25.

Adding to 31423123213 its reverse (31232132413), we get a palindrome (62655255626).

The spelling of 31423123213 in words is "thirty-one billion, four hundred twenty-three million, one hundred twenty-three thousand, two hundred thirteen".