423525225249991 has 2 divisors, whose sum is σ = 423525225249992. Its totient is φ = 423525225249990.

The previous prime is 423525225249953. The next prime is 423525225250037. The reversal of 423525225249991 is 199942522525324.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423525225249991 is a prime.

It is a super-2 number, since 2×423525225249991² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423525225249941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211762612624995 + 211762612624996.

It is an arithmetic number, because the mean of its divisors is an integer number (211762612624996).

Almost surely, 2^{423525225249991} is an apocalyptic number.

423525225249991 is a deficient number, since it is larger than the sum of its proper divisors (1).

423525225249991 is an equidigital number, since it uses as much as digits as its factorization.

423525225249991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968000, while the sum is 64.

The spelling of 423525225249991 in words is "four hundred twenty-three trillion, five hundred twenty-five billion, two hundred twenty-five million, two hundred forty-nine thousand, nine hundred ninety-one".