131550000 has 120 divisors (see below), whose sum is σ = 425254032. Its totient is φ = 35040000.

The previous prime is 131549983. The next prime is 131550031. The reversal of 131550000 is 55131.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 149562 + ... + 150438.

Almost surely, 2^131550000 is an apocalyptic number.

131550000 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 131550000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212627016).

131550000 is an abundant number, since it is smaller than the sum of its proper divisors (293704032).

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

131550000 is an frugal number, since it uses more digits than its factorization.

131550000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913 (or 887 counting only the distinct ones).

The product of its (nonzero) digits is 75, while the sum is 15.

The square root of 131550000 is about 11469.5248375859. The cubic root of 131550000 is about 508.5850823851.

It can be divided in two parts, 1315 and 50000, that added together give a palindrome (51315).

The spelling of 131550000 in words is "one hundred thirty-one million, five hundred fifty thousand".