123543321751 has 2 divisors, whose sum is σ = 123543321752. Its totient is φ = 123543321750.

The previous prime is 123543321701. The next prime is 123543321761. The reversal of 123543321751 is 157123345321.

It is a strong prime.

It is an emirp because it is prime and its reverse (157123345321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123543321751 - 2²⁵ = 123509767319 is a prime.

It is a super-2 number, since 2×123543321751² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123543321751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123543321701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61771660875 + 61771660876.

It is an arithmetic number, because the mean of its divisors is an integer number (61771660876).

Almost surely, 2^123543321751 is an apocalyptic number.

123543321751 is a deficient number, since it is larger than the sum of its proper divisors (1).

123543321751 is an equidigital number, since it uses as much as digits as its factorization.

123543321751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 37.

The spelling of 123543321751 in words is "one hundred twenty-three billion, five hundred forty-three million, three hundred twenty-one thousand, seven hundred fifty-one".