31143001145 has 8 divisors (see below), whose sum is σ = 37372736256. Its totient is φ = 24913644336.

The previous prime is 31143001051. The next prime is 31143001147. The reversal of 31143001145 is 54110034113.

It is a happy number.

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 31143001145 - 2¹⁰ = 31143000121 is a prime.

It is a super-2 number, since 2×31143001145² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31143001145.

It is not an unprimeable number, because it can be changed into a prime (31143001147) 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, 138974 + ... + 285656.

It is an arithmetic number, because the mean of its divisors is an integer number (4671592032).

Almost surely, 2^31143001145 is an apocalyptic number.

It is an amenable number.

31143001145 is a deficient number, since it is larger than the sum of its proper divisors (6229735111).

31143001145 is a wasteful number, since it uses less digits than its factorization.

31143001145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189151.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 31143001145 its reverse (54110034113), we get a palindrome (85253035258).

The spelling of 31143001145 in words is "thirty-one billion, one hundred forty-three million, one thousand, one hundred forty-five".