31005243420344 has 32 divisors (see below), whose sum is σ = 58625909879040. Its totient is φ = 15372186086400.

The previous prime is 31005243420341. The next prime is 31005243420461. The reversal of 31005243420344 is 44302434250013.

It is a super-2 number, since 2×31005243420344² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31005243420341) 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, 31936097 + ... + 32892624.

It is an arithmetic number, because the mean of its divisors is an integer number (1832059683720).

Almost surely, 2^{31005243420344} is an apocalyptic number.

It is an amenable number.

31005243420344 is a deficient number, since it is larger than the sum of its proper divisors (27620666458696).

31005243420344 is a wasteful number, since it uses less digits than its factorization.

31005243420344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64829231 (or 64829227 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 31005243420344 its reverse (44302434250013), we get a palindrome (75307677670357).

The spelling of 31005243420344 in words is "thirty-one trillion, five billion, two hundred forty-three million, four hundred twenty thousand, three hundred forty-four".