131223885 has 16 divisors (see below), whose sum is σ = 226109184. Its totient is φ = 64602432.

The previous prime is 131223881. The next prime is 131223887. The reversal of 131223885 is 588322131.

It is not a de Polignac number, because 131223885 - 2² = 131223881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131223881) 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, 336277 + ... + 336666.

It is an arithmetic number, because the mean of its divisors is an integer number (14131824).

Almost surely, 2^131223885 is an apocalyptic number.

131223885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131223885 is a deficient number, since it is larger than the sum of its proper divisors (94885299).

131223885 is a wasteful number, since it uses less digits than its factorization.

131223885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672964.

The product of its digits is 11520, while the sum is 33.

The square root of 131223885 is about 11455.2994286487. The cubic root of 131223885 is about 508.1644705325.

The spelling of 131223885 in words is "one hundred thirty-one million, two hundred twenty-three thousand, eight hundred eighty-five".