31331045345401 has 4 divisors (see below), whose sum is σ = 31413713011600. Its totient is φ = 31248377679204.

The previous prime is 31331045345359. The next prime is 31331045345447. The reversal of 31331045345401 is 10454354013313.

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 31331045345401 - 2⁹ = 31331045344889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31331045345701) 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, 41333832531 + ... + 41333833288.

It is an arithmetic number, because the mean of its divisors is an integer number (7853428252900).

Almost surely, 2^{31331045345401} is an apocalyptic number.

It is an amenable number.

31331045345401 is a deficient number, since it is larger than the sum of its proper divisors (82667666199).

31331045345401 is an equidigital number, since it uses as much as digits as its factorization.

31331045345401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82667666198.

The product of its (nonzero) digits is 129600, while the sum is 37.

Adding to 31331045345401 its reverse (10454354013313), we get a palindrome (41785399358714).

The spelling of 31331045345401 in words is "thirty-one trillion, three hundred thirty-one billion, forty-five million, three hundred forty-five thousand, four hundred one".