131894505 has 24 divisors (see below), whose sum is σ = 232369800. Its totient is φ = 69189120.

The previous prime is 131894437. The next prime is 131894527. The reversal of 131894505 is 505498131.

It can be written as a sum of positive squares in 4 ways, for example, as 7080921 + 124813584 = 2661^2 + 11172^2 .

It is not a de Polignac number, because 131894505 - 2⁸ = 131894249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131894505.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21280 + ... + 26769.

It is an arithmetic number, because the mean of its divisors is an integer number (9682075).

Almost surely, 2^131894505 is an apocalyptic number.

131894505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131894505 is a deficient number, since it is larger than the sum of its proper divisors (100475295).

131894505 is a wasteful number, since it uses less digits than its factorization.

131894505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48121 (or 48118 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 131894505 is about 11484.5332948274. The cubic root of 131894505 is about 509.0286586638.

The spelling of 131894505 in words is "one hundred thirty-one million, eight hundred ninety-four thousand, five hundred five".