31340443351 has 4 divisors (see below), whose sum is σ = 35817649552. Its totient is φ = 26863237152.

The previous prime is 31340443283. The next prime is 31340443363. The reversal of 31340443351 is 15334404313.

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 31340443351 - 2⁷ = 31340443223 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 (31340443391) 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, 2238603090 + ... + 2238603103.

It is an arithmetic number, because the mean of its divisors is an integer number (8954412388).

Almost surely, 2^31340443351 is an apocalyptic number.

31340443351 is a deficient number, since it is larger than the sum of its proper divisors (4477206201).

31340443351 is an equidigital number, since it uses as much as digits as its factorization.

31340443351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4477206200.

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 31340443351 its reverse (15334404313), we get a palindrome (46674847664).

The spelling of 31340443351 in words is "thirty-one billion, three hundred forty million, four hundred forty-three thousand, three hundred fifty-one".