42272251 has 24 divisors (see below), whose sum is σ = 53778816. Its totient is φ = 32981760.

The previous prime is 42272239. The next prime is 42272273. The reversal of 42272251 is 15227224.

42272251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-42272251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42272201) 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, 25005 + ... + 26641.

It is an arithmetic number, because the mean of its divisors is an integer number (2240784).

Almost surely, 2^42272251 is an apocalyptic number.

42272251 is a deficient number, since it is larger than the sum of its proper divisors (11506565).

42272251 is a wasteful number, since it uses less digits than its factorization.

42272251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699 (or 1692 counting only the distinct ones).

The product of its digits is 2240, while the sum is 25.

The square root of 42272251 is about 6501.7113900880. The cubic root of 42272251 is about 348.3521202497.

Adding to 42272251 its reverse (15227224), we get a palindrome (57499475).

The spelling of 42272251 in words is "forty-two million, two hundred seventy-two thousand, two hundred fifty-one".