31240343011145 has 8 divisors (see below), whose sum is σ = 37554065577600. Its totient is φ = 24948505099440.

The previous prime is 31240343011121. The next prime is 31240343011151. The reversal of 31240343011145 is 54111034304213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-31240343011145 is a prime.

It is a super-2 number, since 2×31240343011145² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5471160545 + ... + 5471166254.

It is an arithmetic number, because the mean of its divisors is an integer number (4694258197200).

Almost surely, 2^{31240343011145} is an apocalyptic number.

It is an amenable number.

31240343011145 is a deficient number, since it is larger than the sum of its proper divisors (6313722566455).

31240343011145 is a wasteful number, since it uses less digits than its factorization.

31240343011145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10942327375.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 31240343011145 its reverse (54111034304213), we get a palindrome (85351377315358).

The spelling of 31240343011145 in words is "thirty-one trillion, two hundred forty billion, three hundred forty-three million, eleven thousand, one hundred forty-five".