42553251 has 24 divisors (see below), whose sum is σ = 66424176. Its totient is φ = 26095680.

The previous prime is 42553249. The next prime is 42553267. The reversal of 42553251 is 15235524.

It is a happy number.

42553251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42553251 - 2¹ = 42553249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42553451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51421 + ... + 52241.

It is an arithmetic number, because the mean of its divisors is an integer number (2767674).

Almost surely, 2^42553251 is an apocalyptic number.

42553251 is a deficient number, since it is larger than the sum of its proper divisors (23870925).

42553251 is a wasteful number, since it uses less digits than its factorization.

42553251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283 (or 1280 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 42553251 is about 6523.2852919369. The cubic root of 42553251 is about 349.1222933025.

Adding to 42553251 its reverse (15235524), we get a palindrome (57788775).

The spelling of 42553251 in words is "forty-two million, five hundred fifty-three thousand, two hundred fifty-one".