42723449231 has 4 divisors (see below), whose sum is σ = 42756289464. Its totient is φ = 42690609000.

The previous prime is 42723449221. The next prime is 42723449257. The reversal of 42723449231 is 13294432724.

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

It is a cyclic number.

It is not a de Polignac number, because 42723449231 - 2²⁶ = 42656340367 is a prime.

It is a super-2 number, since 2×42723449231² (a number of 22 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 (42723449221) 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 in 3 ways as a sum of consecutive naturals, for example, 16418165 + ... + 16420766.

It is an arithmetic number, because the mean of its divisors is an integer number (10689072366).

Almost surely, 2^42723449231 is an apocalyptic number.

42723449231 is a deficient number, since it is larger than the sum of its proper divisors (32840233).

42723449231 is a wasteful number, since it uses less digits than its factorization.

42723449231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32840232.

The product of its digits is 290304, while the sum is 41.

The spelling of 42723449231 in words is "forty-two billion, seven hundred twenty-three million, four hundred forty-nine thousand, two hundred thirty-one".