131621760 has 160 divisors (see below), whose sum is σ = 470230200. Its totient is φ = 35085312.

The previous prime is 131621747. The next prime is 131621771. The reversal of 131621760 is 67126131.

131621760 is a `hidden beast` number, since 1 + 31 + 621 + 7 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 50571 + ... + 53109.

Almost surely, 2^131621760 is an apocalyptic number.

131621760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131621760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235115100).

131621760 is an abundant number, since it is smaller than the sum of its proper divisors (338608440).

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

131621760 is an equidigital number, since it uses as much as digits as its factorization.

131621760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570 (or 2549 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 131621760 is about 11472.6527010975. The cubic root of 131621760 is about 508.6775426192.

Adding to 131621760 its reverse (67126131), we get a palindrome (198747891).

The spelling of 131621760 in words is "one hundred thirty-one million, six hundred twenty-one thousand, seven hundred sixty".