131623320 has 32 divisors (see below), whose sum is σ = 394870320. Its totient is φ = 35099520.

The previous prime is 131623313. The next prime is 131623343. The reversal of 131623320 is 23326131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 548311 + ... + 548550.

Almost surely, 2^131623320 is an apocalyptic number.

131623320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131623320 is an abundant number, since it is smaller than the sum of its proper divisors (263247000).

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

131623320 is a wasteful number, since it uses less digits than its factorization.

131623320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096875 (or 1096871 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 131623320 is about 11472.7206886597. The cubic root of 131623320 is about 508.6795522510.

Adding to 131623320 its reverse (23326131), we get a palindrome (154949451).

It can be divided in two parts, 1316233 and 20, that added together give a triangular number (1316253 = T₁₆₂₂).

The spelling of 131623320 in words is "one hundred thirty-one million, six hundred twenty-three thousand, three hundred twenty".