31144504135145 has 8 divisors (see below), whose sum is σ = 37373454157704. Its totient is φ = 24915570511104.

The previous prime is 31144504135139. The next prime is 31144504135207. The reversal of 31144504135145 is 54153140544113.

It can be written as a sum of positive squares in 4 ways, for example, as 6785649885184 + 24358854249961 = 2604928^2 + 4935469^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 31144504135145 - 2⁶ = 31144504135081 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560177 + ... + 7912193.

It is an arithmetic number, because the mean of its divisors is an integer number (4671681769713).

Almost surely, 2^{31144504135145} is an apocalyptic number.

It is an amenable number.

31144504135145 is a deficient number, since it is larger than the sum of its proper divisors (6228950022559).

31144504135145 is an equidigital number, since it uses as much as digits as its factorization.

31144504135145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8199259.

The product of its (nonzero) digits is 288000, while the sum is 41.

Adding to 31144504135145 its reverse (54153140544113), we get a palindrome (85297644679258).

The spelling of 31144504135145 in words is "thirty-one trillion, one hundred forty-four billion, five hundred four million, one hundred thirty-five thousand, one hundred forty-five".