423216920261 has 4 divisors (see below), whose sum is σ = 423220260012. Its totient is φ = 423213580512.

The previous prime is 423216920221. The next prime is 423216920267. The reversal of 423216920261 is 162029612324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 126757360900 + 296459559361 = 356030^2 + 544481^2 .

It is a cyclic number.

It is not a de Polignac number, because 423216920261 - 2⁶ = 423216920197 is a prime.

It is a super-2 number, since 2×423216920261² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423216920267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1471976 + ... + 1735841.

It is an arithmetic number, because the mean of its divisors is an integer number (105805065003).

Almost surely, 2^423216920261 is an apocalyptic number.

It is an amenable number.

423216920261 is a deficient number, since it is larger than the sum of its proper divisors (3339751).

423216920261 is a wasteful number, since it uses less digits than its factorization.

423216920261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3339750.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 423216920261 in words is "four hundred twenty-three billion, two hundred sixteen million, nine hundred twenty thousand, two hundred sixty-one".