131605361103 has 8 divisors (see below), whose sum is σ = 175475699968. Its totient is φ = 87735964824.

The previous prime is 131605361089. The next prime is 131605361231. The reversal of 131605361103 is 301163506131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131605361103 - 2²⁶ = 131538252239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131605461103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211176 + ... + 554802.

It is an arithmetic number, because the mean of its divisors is an integer number (21934462496).

Almost surely, 2^131605361103 is an apocalyptic number.

131605361103 is a deficient number, since it is larger than the sum of its proper divisors (43870338865).

131605361103 is a wasteful number, since it uses less digits than its factorization.

131605361103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471293.

The product of its (nonzero) digits is 4860, while the sum is 30.

Adding to 131605361103 its reverse (301163506131), we get a palindrome (432768867234).

The spelling of 131605361103 in words is "one hundred thirty-one billion, six hundred five million, three hundred sixty-one thousand, one hundred three".