302220442 has 4 divisors (see below), whose sum is σ = 453330666. Its totient is φ = 151110220.

The previous prime is 302220433. The next prime is 302220449. The reversal of 302220442 is 244022203.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244022203 = 23 ⋅10609661.

It can be written as a sum of positive squares in only one way, i.e., 268009641 + 34210801 = 16371^2 + 5849^2 .

It is not an unprimeable number, because it can be changed into a prime (302220449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75555109 + ... + 75555112.

Almost surely, 2^302220442 is an apocalyptic number.

302220442 is a deficient number, since it is larger than the sum of its proper divisors (151110224).

302220442 is a wasteful number, since it uses less digits than its factorization.

302220442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151110223.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 302220442 is about 17384.4885458273. The cubic root of 302220442 is about 671.0804887149.

Adding to 302220442 its reverse (244022203), we get a palindrome (546242645).

The spelling of 302220442 in words is "three hundred two million, two hundred twenty thousand, four hundred forty-two".