123053557531 has 2 divisors, whose sum is σ = 123053557532. Its totient is φ = 123053557530.

The previous prime is 123053557519. The next prime is 123053557541. The reversal of 123053557531 is 135755350321.

It is a strong prime.

It is an emirp because it is prime and its reverse (135755350321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123053557531 - 2²¹ = 123051460379 is a prime.

It is a super-2 number, since 2×123053557531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123053557541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61526778765 + 61526778766.

It is an arithmetic number, because the mean of its divisors is an integer number (61526778766).

Almost surely, 2^123053557531 is an apocalyptic number.

123053557531 is a deficient number, since it is larger than the sum of its proper divisors (1).

123053557531 is an equidigital number, since it uses as much as digits as its factorization.

123053557531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 236250, while the sum is 40.

The spelling of 123053557531 in words is "one hundred twenty-three billion, fifty-three million, five hundred fifty-seven thousand, five hundred thirty-one".