156222202 has 4 divisors (see below), whose sum is σ = 234333306. Its totient is φ = 78111100.

The previous prime is 156222191. The next prime is 156222203. The reversal of 156222202 is 202222651.

It is a happy number.

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., 104223681 + 51998521 = 10209^2 + 7211^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (156222203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39055549 + ... + 39055552.

Almost surely, 2^156222202 is an apocalyptic number.

156222202 is a deficient number, since it is larger than the sum of its proper divisors (78111104).

156222202 is an equidigital number, since it uses as much as digits as its factorization.

156222202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78111103.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 156222202 is about 12498.8880305410. Note that the first 3 decimals coincide. The cubic root of 156222202 is about 538.5767298267.

Adding to 156222202 its reverse (202222651), we get a palindrome (358444853).

The spelling of 156222202 in words is "one hundred fifty-six million, two hundred twenty-two thousand, two hundred two".