100220257 has 2 divisors, whose sum is σ = 100220258. Its totient is φ = 100220256.

The previous prime is 100220249. The next prime is 100220261. The reversal of 100220257 is 752022001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99281296 + 938961 = 9964^2 + 969^2 .

It is a cyclic number.

It is not a de Polignac number, because 100220257 - 2³ = 100220249 is a prime.

It is not a weakly prime, because it can be changed into another prime (100220227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50110128 + 50110129.

It is an arithmetic number, because the mean of its divisors is an integer number (50110129).

Almost surely, 2^100220257 is an apocalyptic number.

It is an amenable number.

100220257 is a deficient number, since it is larger than the sum of its proper divisors (1).

100220257 is an equidigital number, since it uses as much as digits as its factorization.

100220257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 100220257 is about 10011.0067925259. The cubic root of 100220257 is about 464.4994142797.

Adding to 100220257 its reverse (752022001), we get a palindrome (852242258).

The spelling of 100220257 in words is "one hundred million, two hundred twenty thousand, two hundred fifty-seven".