42222401 has 8 divisors (see below), whose sum is σ = 45982440. Its totient is φ = 38535552.

The previous prime is 42222391. The next prime is 42222409. The reversal of 42222401 is 10422224.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2972176 + 39250225 = 1724^2 + 6265^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42222401 is a prime.

It is a super-2 number, since 2×42222401² = 3565462292409602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42222401.

It is not an unprimeable number, because it can be changed into a prime (42222409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17090 + ... + 19403.

It is an arithmetic number, because the mean of its divisors is an integer number (5747805).

Almost surely, 2^42222401 is an apocalyptic number.

It is an amenable number.

42222401 is a deficient number, since it is larger than the sum of its proper divisors (3760039).

42222401 is a wasteful number, since it uses less digits than its factorization.

42222401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36595.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 42222401 is about 6497.8766531845. The cubic root of 42222401 is about 348.2151337448.

Adding to 42222401 its reverse (10422224), we get a palindrome (52644625).

The spelling of 42222401 in words is "forty-two million, two hundred twenty-two thousand, four hundred one".