126718223531 has 2 divisors, whose sum is σ = 126718223532. Its totient is φ = 126718223530.

The previous prime is 126718223503. The next prime is 126718223557. The reversal of 126718223531 is 135322817621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126718223531 - 2¹⁸ = 126717961387 is a prime.

It is a super-2 number, since 2×126718223531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126718223581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63359111765 + 63359111766.

It is an arithmetic number, because the mean of its divisors is an integer number (63359111766).

Almost surely, 2^126718223531 is an apocalyptic number.

126718223531 is a deficient number, since it is larger than the sum of its proper divisors (1).

126718223531 is an equidigital number, since it uses as much as digits as its factorization.

126718223531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The spelling of 126718223531 in words is "one hundred twenty-six billion, seven hundred eighteen million, two hundred twenty-three thousand, five hundred thirty-one".