131103420431 has 4 divisors (see below), whose sum is σ = 131104144752. Its totient is φ = 131102696112.

The previous prime is 131103420391. The next prime is 131103420463. The reversal of 131103420431 is 134024301131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131103420431 is a prime.

It is a super-2 number, since 2×131103420431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131103420397 and 131103420406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131103440431) 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, 169811 + ... + 539483.

It is an arithmetic number, because the mean of its divisors is an integer number (32776036188).

Almost surely, 2^131103420431 is an apocalyptic number.

131103420431 is a deficient number, since it is larger than the sum of its proper divisors (724321).

131103420431 is an equidigital number, since it uses as much as digits as its factorization.

131103420431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724320.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 131103420431 its reverse (134024301131), we get a palindrome (265127721562).

The spelling of 131103420431 in words is "one hundred thirty-one billion, one hundred three million, four hundred twenty thousand, four hundred thirty-one".