103111031 has 4 divisors (see below), whose sum is σ = 104023632. Its totient is φ = 102198432.

The previous prime is 103111027. The next prime is 103111061. The reversal of 103111031 is 130111301.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 103111031 - 2² = 103111027 is a prime.

It is a super-2 number, since 2×103111031² = 21263769427765922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103111061) 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, 456131 + ... + 456356.

It is an arithmetic number, because the mean of its divisors is an integer number (26005908).

Almost surely, 2^103111031 is an apocalyptic number.

103111031 is a deficient number, since it is larger than the sum of its proper divisors (912601).

103111031 is an equidigital number, since it uses as much as digits as its factorization.

103111031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912600.

The product of its (nonzero) digits is 9, while the sum is 11.

The square root of 103111031 is about 10154.3601964870. The cubic root of 103111031 is about 468.9231889581.

Adding to 103111031 its reverse (130111301), we get a palindrome (233222332).

The spelling of 103111031 in words is "one hundred three million, one hundred eleven thousand, thirty-one".