131772550 has 48 divisors (see below), whose sum is σ = 301668192. Its totient is φ = 41702400.

The previous prime is 131772527. The next prime is 131772551. The reversal of 131772550 is 55277131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131772551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9931 + ... + 19030.

It is an arithmetic number, because the mean of its divisors is an integer number (6284754).

Almost surely, 2^131772550 is an apocalyptic number.

131772550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131772550 is an abundant number, since it is smaller than the sum of its proper divisors (169895642).

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

131772550 is a wasteful number, since it uses less digits than its factorization.

131772550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28993 (or 28988 counting only the distinct ones).

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 131772550 is about 11479.2225346493. Note that the first 3 decimals coincide. The cubic root of 131772550 is about 508.8717207803.

The spelling of 131772550 in words is "one hundred thirty-one million, seven hundred seventy-two thousand, five hundred fifty".