31372143505 has 8 divisors (see below), whose sum is σ = 38447563392. Its totient is φ = 24563720688.

The previous prime is 31372143503. The next prime is 31372143511. The reversal of 31372143505 is 50534127313.

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 31372143505 - 2¹ = 31372143503 is a prime.

It is a super-2 number, since 2×31372143505² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31372143503) 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, 66749007 + ... + 66749476.

It is an arithmetic number, because the mean of its divisors is an integer number (4805945424).

Almost surely, 2^31372143505 is an apocalyptic number.

It is an amenable number.

31372143505 is a deficient number, since it is larger than the sum of its proper divisors (7075419887).

31372143505 is a wasteful number, since it uses less digits than its factorization.

31372143505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133498535.

The product of its (nonzero) digits is 37800, while the sum is 34.

The spelling of 31372143505 in words is "thirty-one billion, three hundred seventy-two million, one hundred forty-three thousand, five hundred five".