31105434 has 16 divisors (see below), whose sum is σ = 62265600. Its totient is φ = 10359360.

The previous prime is 31105423. The next prime is 31105457. The reversal of 31105434 is 43450113.

It is a self number, because there is not a number n which added to its sum of digits gives 31105434.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11767 + ... + 14165.

It is an arithmetic number, because the mean of its divisors is an integer number (3891600).

Almost surely, 2^31105434 is an apocalyptic number.

31105434 is an abundant number, since it is smaller than the sum of its proper divisors (31160166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31105434 is a wasteful number, since it uses less digits than its factorization.

31105434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4565.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 31105434 is about 5577.2245785875. The cubic root of 31105434 is about 314.4938002338.

Adding to 31105434 its reverse (43450113), we get a palindrome (74555547).

The spelling of 31105434 in words is "thirty-one million, one hundred five thousand, four hundred thirty-four".