31190000444 has 12 divisors (see below), whose sum is σ = 54637254504. Its totient is φ = 15579356304.

The previous prime is 31190000423. The next prime is 31190000447. The reversal of 31190000444 is 44400009113.

It is a super-2 number, since 2×31190000444² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3906494 + ... + 3914469.

It is an arithmetic number, because the mean of its divisors is an integer number (4553104542).

Almost surely, 2^31190000444 is an apocalyptic number.

It is an amenable number.

31190000444 is a deficient number, since it is larger than the sum of its proper divisors (23447254060).

31190000444 is a wasteful number, since it uses less digits than its factorization.

31190000444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7821964 (or 7821962 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 31190000444 its reverse (44400009113), we get a palindrome (75590009557).

The spelling of 31190000444 in words is "thirty-one billion, one hundred ninety million, four hundred forty-four", and thus it is an aban number.