42523553 has 4 divisors (see below), whose sum is σ = 42536640. Its totient is φ = 42510468.

The previous prime is 42523531. The next prime is 42523571. The reversal of 42523553 is 35532524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42523553 - 2⁶ = 42523489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42523583) 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, 2468 + ... + 9546.

It is an arithmetic number, because the mean of its divisors is an integer number (10634160).

Almost surely, 2^42523553 is an apocalyptic number.

It is an amenable number.

42523553 is a deficient number, since it is larger than the sum of its proper divisors (13087).

42523553 is an equidigital number, since it uses as much as digits as its factorization.

42523553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13086.

The product of its digits is 18000, while the sum is 29.

The square root of 42523553 is about 6521.0085876343. The cubic root of 42523553 is about 349.0410566828.

The spelling of 42523553 in words is "forty-two million, five hundred twenty-three thousand, five hundred fifty-three".