123131151500 has 48 divisors (see below), whose sum is σ = 307335362880. Its totient is φ = 42216393600.

The previous prime is 123131151457. The next prime is 123131151547. The reversal of 123131151500 is 5151131321.

It is a super-2 number, since 2×123131151500² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17586665 + ... + 17593664.

It is an arithmetic number, because the mean of its divisors is an integer number (6402820060).

Almost surely, 2^123131151500 is an apocalyptic number.

123131151500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123131151500 is an abundant number, since it is smaller than the sum of its proper divisors (184204211380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123131151500 is a wasteful number, since it uses less digits than its factorization.

123131151500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35180355 (or 35180343 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 23.

Adding to 123131151500 its reverse (5151131321), we get a palindrome (128282282821).

The spelling of 123131151500 in words is "one hundred twenty-three billion, one hundred thirty-one million, one hundred fifty-one thousand, five hundred".