201220457 has 2 divisors, whose sum is σ = 201220458. Its totient is φ = 201220456.

The previous prime is 201220429. The next prime is 201220519. The reversal of 201220457 is 754022102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152374336 + 48846121 = 12344^2 + 6989^2 .

It is a cyclic number.

It is not a de Polignac number, because 201220457 - 2¹² = 201216361 is a prime.

It is not a weakly prime, because it can be changed into another prime (201220057) 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, 100610228 + 100610229.

It is an arithmetic number, because the mean of its divisors is an integer number (100610229).

Almost surely, 2^201220457 is an apocalyptic number.

It is an amenable number.

201220457 is a deficient number, since it is larger than the sum of its proper divisors (1).

201220457 is an equidigital number, since it uses as much as digits as its factorization.

201220457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 201220457 is about 14185.2196669632. The cubic root of 201220457 is about 585.9906821351.

Adding to 201220457 its reverse (754022102), we get a palindrome (955242559).

The spelling of 201220457 in words is "two hundred one million, two hundred twenty thousand, four hundred fifty-seven".