220012157 has 2 divisors, whose sum is σ = 220012158. Its totient is φ = 220012156.

The previous prime is 220012103. The next prime is 220012159. The reversal of 220012157 is 751210022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189915961 + 30096196 = 13781^2 + 5486^2 .

It is a cyclic number.

It is not a de Polignac number, because 220012157 - 2⁸ = 220011901 is a prime.

Together with 220012159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220012159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110006078 + 110006079.

It is an arithmetic number, because the mean of its divisors is an integer number (110006079).

Almost surely, 2^220012157 is an apocalyptic number.

It is an amenable number.

220012157 is a deficient number, since it is larger than the sum of its proper divisors (1).

220012157 is an equidigital number, since it uses as much as digits as its factorization.

220012157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 220012157 is about 14832.8067809164. The cubic root of 220012157 is about 603.6921930974.

Adding to 220012157 its reverse (751210022), we get a palindrome (971222179).

The spelling of 220012157 in words is "two hundred twenty million, twelve thousand, one hundred fifty-seven".