31475890186 has 16 divisors (see below), whose sum is σ = 51320866464. Its totient is φ = 14391563184.

The previous prime is 31475890183. The next prime is 31475890291. The reversal of 31475890186 is 68109857413.

It is a super-2 number, since 2×31475890186² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31475890183) 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, 5654280 + ... + 5659843.

It is an arithmetic number, because the mean of its divisors is an integer number (3207554154).

Almost surely, 2^31475890186 is an apocalyptic number.

31475890186 is a deficient number, since it is larger than the sum of its proper divisors (19844976278).

31475890186 is a wasteful number, since it uses less digits than its factorization.

31475890186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11314245.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 31475890186 in words is "thirty-one billion, four hundred seventy-five million, eight hundred ninety thousand, one hundred eighty-six".