42723555 has 32 divisors (see below), whose sum is σ = 79302144. Its totient is φ = 19236096.

The previous prime is 42723547. The next prime is 42723557. The reversal of 42723555 is 55532724.

It is not a de Polignac number, because 42723555 - 2³ = 42723547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42723557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3999 + ... + 10071.

It is an arithmetic number, because the mean of its divisors is an integer number (2478192).

Almost surely, 2^42723555 is an apocalyptic number.

42723555 is a deficient number, since it is larger than the sum of its proper divisors (36578589).

42723555 is a wasteful number, since it uses less digits than its factorization.

42723555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6155.

The product of its digits is 42000, while the sum is 33.

The square root of 42723555 is about 6536.3258027733. The cubic root of 42723555 is about 349.5874186004.

The spelling of 42723555 in words is "forty-two million, seven hundred twenty-three thousand, five hundred fifty-five".