131125550 has 12 divisors (see below), whose sum is σ = 243893616. Its totient is φ = 52450200.

The previous prime is 131125541. The next prime is 131125571. The reversal of 131125550 is 55521131.

It is a happy number.

131125550 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1311206 + ... + 1311305.

It is an arithmetic number, because the mean of its divisors is an integer number (20324468).

Almost surely, 2^131125550 is an apocalyptic number.

131125550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131125550 is a deficient number, since it is larger than the sum of its proper divisors (112768066).

131125550 is a wasteful number, since it uses less digits than its factorization.

131125550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2622523 (or 2622518 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 131125550 is about 11451.0065059802. The cubic root of 131125550 is about 508.0375047227.

Adding to 131125550 its reverse (55521131), we get a palindrome (186646681).

The spelling of 131125550 in words is "one hundred thirty-one million, one hundred twenty-five thousand, five hundred fifty".