131623280 has 20 divisors (see below), whose sum is σ = 306024312. Its totient is φ = 52649280.

The previous prime is 131623267. The next prime is 131623291. The reversal of 131623280 is 82326131.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 822566 + ... + 822725.

Almost surely, 2^131623280 is an apocalyptic number.

131623280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131623280 is an abundant number, since it is smaller than the sum of its proper divisors (174401032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131623280 is a wasteful number, since it uses less digits than its factorization.

131623280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645304 (or 1645298 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 131623280 is about 11472.7189453939. The cubic root of 131623280 is about 508.6795007222.

The spelling of 131623280 in words is "one hundred thirty-one million, six hundred twenty-three thousand, two hundred eighty".