131225547 has 4 divisors (see below), whose sum is σ = 174967400. Its totient is φ = 87483696.

The previous prime is 131225539. The next prime is 131225581. The reversal of 131225547 is 745522131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 131225547 - 2³ = 131225539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131225527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21870922 + ... + 21870927.

It is an arithmetic number, because the mean of its divisors is an integer number (43741850).

Almost surely, 2^131225547 is an apocalyptic number.

131225547 is a deficient number, since it is larger than the sum of its proper divisors (43741853).

131225547 is an equidigital number, since it uses as much as digits as its factorization.

131225547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43741852.

The product of its digits is 8400, while the sum is 30.

The square root of 131225547 is about 11455.3719712631. The cubic root of 131225547 is about 508.1666158883.

Adding to 131225547 its reverse (745522131), we get a palindrome (876747678).

The spelling of 131225547 in words is "one hundred thirty-one million, two hundred twenty-five thousand, five hundred forty-seven".