31190000443 has 8 divisors (see below), whose sum is σ = 35726915840. Its totient is φ = 26673385320.

The previous prime is 31190000423. The next prime is 31190000447. The reversal of 31190000443 is 34400009113.

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 a de Polignac number, because none of the positive numbers 2^k-31190000443 is a prime.

It is a super-2 number, since 2×31190000443² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31190000447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5071773 + ... + 5077918.

It is an arithmetic number, because the mean of its divisors is an integer number (4465864480).

Almost surely, 2^31190000443 is an apocalyptic number.

31190000443 is a deficient number, since it is larger than the sum of its proper divisors (4536915397).

31190000443 is a wasteful number, since it uses less digits than its factorization.

31190000443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10150137.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 31190000443 its reverse (34400009113), we get a palindrome (65590009556).

The spelling of 31190000443 in words is "thirty-one billion, one hundred ninety million, four hundred forty-three", and thus it is an aban number.