123531023502550 has 48 divisors (see below), whose sum is σ = 234643599036000. Its totient is φ = 48368136061440.

The previous prime is 123531023502541. The next prime is 123531023502553. The reversal of 123531023502550 is 55205320135321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123531023502553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52681050 + ... + 54975949.

It is an arithmetic number, because the mean of its divisors is an integer number (4888408313250).

Almost surely, 2^{123531023502550} is an apocalyptic number.

123531023502550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123531023502550 is a deficient number, since it is larger than the sum of its proper divisors (111112575533450).

123531023502550 is a wasteful number, since it uses less digits than its factorization.

123531023502550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107657497 (or 107657492 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 37.

Adding to 123531023502550 its reverse (55205320135321), we get a palindrome (178736343637871).

The spelling of 123531023502550 in words is "one hundred twenty-three trillion, five hundred thirty-one billion, twenty-three million, five hundred two thousand, five hundred fifty".