42255723 has 4 divisors (see below), whose sum is σ = 56340968. Its totient is φ = 28170480.

The previous prime is 42255701. The next prime is 42255749. The reversal of 42255723 is 32755224.

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

It is not a de Polignac number, because 42255723 - 2⁸ = 42255467 is a prime.

It is a super-2 number, since 2×42255723² = 3571092252505458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42255223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7042618 + ... + 7042623.

It is an arithmetic number, because the mean of its divisors is an integer number (14085242).

Almost surely, 2^42255723 is an apocalyptic number.

42255723 is a deficient number, since it is larger than the sum of its proper divisors (14085245).

42255723 is a wasteful number, since it uses less digits than its factorization.

42255723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14085244.

The product of its digits is 16800, while the sum is 30.

The square root of 42255723 is about 6500.4402158623. The cubic root of 42255723 is about 348.3067136749.

The spelling of 42255723 in words is "forty-two million, two hundred fifty-five thousand, seven hundred twenty-three".