31343270641 has 4 divisors (see below), whose sum is σ = 31636198512. Its totient is φ = 31050342772.

The previous prime is 31343270633. The next prime is 31343270669. The reversal of 31343270641 is 14607234313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31343270641 - 2³ = 31343270633 is a prime.

It is a super-2 number, since 2×31343270641² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31343270597 and 31343270606.

It is not an unprimeable number, because it can be changed into a prime (31343270671) 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, 146463775 + ... + 146463988.

It is an arithmetic number, because the mean of its divisors is an integer number (7909049628).

Almost surely, 2^31343270641 is an apocalyptic number.

It is an amenable number.

31343270641 is a deficient number, since it is larger than the sum of its proper divisors (292927871).

31343270641 is a wasteful number, since it uses less digits than its factorization.

31343270641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292927870.

The product of its (nonzero) digits is 36288, while the sum is 34.

The spelling of 31343270641 in words is "thirty-one billion, three hundred forty-three million, two hundred seventy thousand, six hundred forty-one".