103431131 has 4 divisors (see below), whose sum is σ = 103719600. Its totient is φ = 103142664.

The previous prime is 103431103. The next prime is 103431137. The reversal of 103431131 is 131134301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131134301 = 1783 ⋅73547.

It is a cyclic number.

It is not a de Polignac number, because 103431131 - 2²² = 99236827 is a prime.

It is a super-2 number, since 2×103431131² = 21395997719878322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103431137) 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, 143696 + ... + 144413.

It is an arithmetic number, because the mean of its divisors is an integer number (25929900).

Almost surely, 2^103431131 is an apocalyptic number.

103431131 is a deficient number, since it is larger than the sum of its proper divisors (288469).

103431131 is an equidigital number, since it uses as much as digits as its factorization.

103431131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288468.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 103431131 is about 10170.1096847576. The cubic root of 103431131 is about 469.4079326102.

Adding to 103431131 its reverse (131134301), we get a palindrome (234565432).

The spelling of 103431131 in words is "one hundred three million, four hundred thirty-one thousand, one hundred thirty-one".