125531331550 has 24 divisors (see below), whose sum is σ = 234045567000. Its totient is φ = 50092685280.

The previous prime is 125531331503. The next prime is 125531331589. The reversal of 125531331550 is 55133135521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2975025 + ... + 3016924.

It is an arithmetic number, because the mean of its divisors is an integer number (9751898625).

Almost surely, 2^125531331550 is an apocalyptic number.

125531331550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125531331550 is a deficient number, since it is larger than the sum of its proper divisors (108514235450).

125531331550 is a wasteful number, since it uses less digits than its factorization.

125531331550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5992380 (or 5992375 counting only the distinct ones).

The product of its (nonzero) digits is 33750, while the sum is 34.

The spelling of 125531331550 in words is "one hundred twenty-five billion, five hundred thirty-one million, three hundred thirty-one thousand, five hundred fifty".