42222394 has 4 divisors (see below), whose sum is σ = 63333594. Its totient is φ = 21111196.

The previous prime is 42222391. The next prime is 42222409. The reversal of 42222394 is 49322224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 25371369 + 16851025 = 5037^2 + 4105^2 .

It is not an unprimeable number, because it can be changed into a prime (42222391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555597 + ... + 10555600.

Almost surely, 2^42222394 is an apocalyptic number.

42222394 is a deficient number, since it is larger than the sum of its proper divisors (21111200).

42222394 is a wasteful number, since it uses less digits than its factorization.

42222394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21111199.

The product of its digits is 6912, while the sum is 28.

The square root of 42222394 is about 6497.8761145470. The cubic root of 42222394 is about 348.2151145014.

The spelling of 42222394 in words is "forty-two million, two hundred twenty-two thousand, three hundred ninety-four".