31253212343 has 4 divisors (see below), whose sum is σ = 31261866168. Its totient is φ = 31244558520.

The previous prime is 31253212307. The next prime is 31253212387. The reversal of 31253212343 is 34321235213.

It is a happy number.

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 31253212343 - 2¹² = 31253208247 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 (31253212643) 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, 4321493 + ... + 4328718.

It is an arithmetic number, because the mean of its divisors is an integer number (7815466542).

Almost surely, 2^31253212343 is an apocalyptic number.

31253212343 is a deficient number, since it is larger than the sum of its proper divisors (8653825).

31253212343 is an equidigital number, since it uses as much as digits as its factorization.

31253212343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8653824.

The product of its digits is 12960, while the sum is 29.

Adding to 31253212343 its reverse (34321235213), we get a palindrome (65574447556).

The spelling of 31253212343 in words is "thirty-one billion, two hundred fifty-three million, two hundred twelve thousand, three hundred forty-three".