131154505 has 4 divisors (see below), whose sum is σ = 157385412. Its totient is φ = 104923600.

The previous prime is 131154497. The next prime is 131154509. The reversal of 131154505 is 505451131.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 82210489 + 48944016 = 9067^2 + 6996^2 .

It is not a de Polignac number, because 131154505 - 2³ = 131154497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131154505.

It is not an unprimeable number, because it can be changed into a prime (131154509) 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, 13115446 + ... + 13115455.

It is an arithmetic number, because the mean of its divisors is an integer number (39346353).

Almost surely, 2^131154505 is an apocalyptic number.

It is an amenable number.

131154505 is a deficient number, since it is larger than the sum of its proper divisors (26230907).

131154505 is an equidigital number, since it uses as much as digits as its factorization.

131154505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26230906.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 131154505 is about 11452.2707355354. The cubic root of 131154505 is about 508.0748967319.

The spelling of 131154505 in words is "one hundred thirty-one million, one hundred fifty-four thousand, five hundred five".