423154420636531 has 2 divisors, whose sum is σ = 423154420636532. Its totient is φ = 423154420636530.

The previous prime is 423154420636501. The next prime is 423154420636721. The reversal of 423154420636531 is 135636024451324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423154420636531 - 2⁷ = 423154420636403 is a prime.

It is a super-2 number, since 2×423154420636531² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (423154420636501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211577210318265 + 211577210318266.

It is an arithmetic number, because the mean of its divisors is an integer number (211577210318266).

Almost surely, 2^{423154420636531} is an apocalyptic number.

423154420636531 is a deficient number, since it is larger than the sum of its proper divisors (1).

423154420636531 is an equidigital number, since it uses as much as digits as its factorization.

423154420636531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6220800, while the sum is 49.

The spelling of 423154420636531 in words is "four hundred twenty-three trillion, one hundred fifty-four billion, four hundred twenty million, six hundred thirty-six thousand, five hundred thirty-one".