131245550 has 12 divisors (see below), whose sum is σ = 244116816. Its totient is φ = 52498200.

The previous prime is 131245547. The next prime is 131245577. The reversal of 131245550 is 55542131.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1312406 + ... + 1312505.

It is an arithmetic number, because the mean of its divisors is an integer number (20343068).

Almost surely, 2^131245550 is an apocalyptic number.

131245550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131245550 is a deficient number, since it is larger than the sum of its proper divisors (112871266).

131245550 is a wasteful number, since it uses less digits than its factorization.

131245550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2624923 (or 2624918 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 131245550 is about 11456.2450218211. The cubic root of 131245550 is about 508.1924348964.

Adding to 131245550 its reverse (55542131), we get a palindrome (186787681).

The spelling of 131245550 in words is "one hundred thirty-one million, two hundred forty-five thousand, five hundred fifty".