42523623 has 10 divisors (see below), whose sum is σ = 63523064. Its totient is φ = 28349028.

The previous prime is 42523589. The next prime is 42523643. The reversal of 42523623 is 32632524.

42523623 is a `hidden beast` number, since 425 + 236 + 2 + 3 = 666.

It is not a de Polignac number, because 42523623 - 2¹⁴ = 42507239 is a prime.

It is a super-2 number, since 2×42523623² = 3616517026092258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42523643) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 262411 + ... + 262572.

Almost surely, 2^42523623 is an apocalyptic number.

42523623 is a deficient number, since it is larger than the sum of its proper divisors (20999441).

42523623 is an equidigital number, since it uses as much as digits as its factorization.

42523623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524995 (or 524986 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The square root of 42523623 is about 6521.0139549000. The cubic root of 42523623 is about 349.0412482069.

It can be divided in two parts, 4252 and 3623, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 42523623 in words is "forty-two million, five hundred twenty-three thousand, six hundred twenty-three".