422144397 has 6 divisors (see below), whose sum is σ = 609764142. Its totient is φ = 281429592.

The previous prime is 422144381. The next prime is 422144407. The reversal of 422144397 is 793441224.

422144397 is a `hidden beast` number, since 4 + 2 + 214 + 439 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 420824196 + 1320201 = 20514^2 + 1149^2 .

It is not a de Polignac number, because 422144397 - 2⁴ = 422144381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422144377) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23452458 + ... + 23452475.

It is an arithmetic number, because the mean of its divisors is an integer number (101627357).

Almost surely, 2^422144397 is an apocalyptic number.

It is an amenable number.

422144397 is a deficient number, since it is larger than the sum of its proper divisors (187619745).

422144397 is a wasteful number, since it uses less digits than its factorization.

422144397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46904939 (or 46904936 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 422144397 is about 20546.1528515681. The cubic root of 422144397 is about 750.1596086977.

It can be divided in two parts, 4 and 22144397, that multiplied together give a palindrome (88577588).

The spelling of 422144397 in words is "four hundred twenty-two million, one hundred forty-four thousand, three hundred ninety-seven".