123213687552 has 54 divisors (see below), whose sum is σ = 355255443452. Its totient is φ = 41071228416.

The previous prime is 123213687551. The next prime is 123213687557. The reversal of 123213687552 is 255786312321.

123213687552 is a `hidden beast` number, since 1 + 2 + 3 + 2 + 13 + 6 + 87 + 552 = 666.

It is a super-2 number, since 2×123213687552² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123213687498 and 123213687507.

It is not an unprimeable number, because it can be changed into a prime (123213687551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26736778 + ... + 26741385.

Almost surely, 2^123213687552 is an apocalyptic number.

123213687552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123213687552 is an abundant number, since it is smaller than the sum of its proper divisors (232041755900).

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

123213687552 is an equidigital number, since it uses as much as digits as its factorization.

123213687552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53478185 (or 53478168 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

Adding to 123213687552 its reverse (255786312321), we get a palindrome (378999999873).

The spelling of 123213687552 in words is "one hundred twenty-three billion, two hundred thirteen million, six hundred eighty-seven thousand, five hundred fifty-two".