131545505 has 16 divisors (see below), whose sum is σ = 194283264. Its totient is φ = 83263680.

The previous prime is 131545501. The next prime is 131545511. The reversal of 131545505 is 505545131.

It is not a de Polignac number, because 131545505 - 2² = 131545501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131545501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144101 + ... + 145010.

It is an arithmetic number, because the mean of its divisors is an integer number (12142704).

Almost surely, 2^131545505 is an apocalyptic number.

It is an amenable number.

131545505 is a deficient number, since it is larger than the sum of its proper divisors (62737759).

131545505 is a wasteful number, since it uses less digits than its factorization.

131545505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289136.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 131545505 is about 11469.3288818483. The cubic root of 131545505 is about 508.5792896169.

The spelling of 131545505 in words is "one hundred thirty-one million, five hundred forty-five thousand, five hundred five".