31030105 has 16 divisors (see below), whose sum is σ = 39688704. Its totient is φ = 23235520.

The previous prime is 31030093. The next prime is 31030123. The reversal of 31030105 is 50103013.

It is not a de Polignac number, because 31030105 - 2⁵ = 31030073 is a prime.

It is a super-2 number, since 2×31030105² = 1925734832622050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2535 + ... + 8275.

It is an arithmetic number, because the mean of its divisors is an integer number (2480544).

Almost surely, 2^31030105 is an apocalyptic number.

It is an amenable number.

31030105 is a deficient number, since it is larger than the sum of its proper divisors (8658599).

31030105 is a wasteful number, since it uses less digits than its factorization.

31030105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5816.

The product of its (nonzero) digits is 45, while the sum is 13.

The square root of 31030105 is about 5570.4672155933. The cubic root of 31030105 is about 314.2397218708.

Adding to 31030105 its reverse (50103013), we get a palindrome (81133118).

The spelling of 31030105 in words is "thirty-one million, thirty thousand, one hundred five".