422642251 has 8 divisors (see below), whose sum is σ = 459238400. Its totient is φ = 387481320.

The previous prime is 422642243. The next prime is 422642257. The reversal of 422642251 is 152246224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 422642251 - 2³ = 422642243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422642257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 358191 + ... + 359368.

It is an arithmetic number, because the mean of its divisors is an integer number (57404800).

Almost surely, 2^422642251 is an apocalyptic number.

422642251 is a deficient number, since it is larger than the sum of its proper divisors (36596149).

422642251 is a wasteful number, since it uses less digits than its factorization.

422642251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717609.

The product of its digits is 7680, while the sum is 28.

The square root of 422642251 is about 20558.2647857255. The cubic root of 422642251 is about 750.4543919077.

Adding to 422642251 its reverse (152246224), we get a palindrome (574888475).

The spelling of 422642251 in words is "four hundred twenty-two million, six hundred forty-two thousand, two hundred fifty-one".