131038505 has 8 divisors (see below), whose sum is σ = 169342152. Its totient is φ = 96766848.

The previous prime is 131038493. The next prime is 131038541. The reversal of 131038505 is 505830131.

It can be written as a sum of positive squares in 4 ways, for example, as 6135529 + 124902976 = 2477^2 + 11176^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 131038505 - 2⁸ = 131038249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1007924 + ... + 1008053.

It is an arithmetic number, because the mean of its divisors is an integer number (21167769).

Almost surely, 2^131038505 is an apocalyptic number.

It is an amenable number.

131038505 is a deficient number, since it is larger than the sum of its proper divisors (38303647).

131038505 is a wasteful number, since it uses less digits than its factorization.

131038505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015995.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 131038505 is about 11447.2051174075. The cubic root of 131038505 is about 507.9250630881.

Adding to 131038505 its reverse (505830131), we get a palindrome (636868636).

The spelling of 131038505 in words is "one hundred thirty-one million, thirty-eight thousand, five hundred five".