131552505 has 80 divisors (see below), whose sum is σ = 275299200. Its totient is φ = 60074784.

The previous prime is 131552503. The next prime is 131552513. The reversal of 131552505 is 505255131.

131552505 is a `hidden beast` number, since 1 + 3 + 155 + 2 + 505 = 666.

It is not a de Polignac number, because 131552505 - 2¹ = 131552503 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (131552503) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 138442 + ... + 139388.

It is an arithmetic number, because the mean of its divisors is an integer number (3441240).

Almost surely, 2^131552505 is an apocalyptic number.

131552505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131552505 is an abundant number, since it is smaller than the sum of its proper divisors (143746695).

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

131552505 is an frugal number, since it uses more digits than its factorization.

131552505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985 (or 962 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 131552505 is about 11469.6340394975. The cubic root of 131552505 is about 508.5883105558.

The spelling of 131552505 in words is "one hundred thirty-one million, five hundred fifty-two thousand, five hundred five".