131333550 has 48 divisors (see below), whose sum is σ = 329859840. Its totient is φ = 34575840.

The previous prime is 131333513. The next prime is 131333563. The reversal of 131333550 is 55333131.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 131333550.

It is a congruent number.

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, 6309 + ... + 17391.

It is an arithmetic number, because the mean of its divisors is an integer number (6872080).

Almost surely, 2^131333550 is an apocalyptic number.

131333550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 131333550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164929920).

131333550 is an abundant number, since it is smaller than the sum of its proper divisors (198526290).

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

131333550 is a wasteful number, since it uses less digits than its factorization.

131333550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11177 (or 11172 counting only the distinct ones).

The product of its (nonzero) digits is 2025, while the sum is 24.

The square root of 131333550 is about 11460.0850782182. The cubic root of 131333550 is about 508.3059903475.

Adding to 131333550 its reverse (55333131), we get a palindrome (186666681).

The spelling of 131333550 in words is "one hundred thirty-one million, three hundred thirty-three thousand, five hundred fifty".