655153217 has 2 divisors, whose sum is σ = 655153218. Its totient is φ = 655153216.

The previous prime is 655153153. The next prime is 655153223. The reversal of 655153217 is 712351556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 449058481 + 206094736 = 21191^2 + 14356^2 .

It is a cyclic number.

It is not a de Polignac number, because 655153217 - 2⁶ = 655153153 is a prime.

It is not a weakly prime, because it can be changed into another prime (655153267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327576608 + 327576609.

It is an arithmetic number, because the mean of its divisors is an integer number (327576609).

Almost surely, 2^655153217 is an apocalyptic number.

It is an amenable number.

655153217 is a deficient number, since it is larger than the sum of its proper divisors (1).

655153217 is an equidigital number, since it uses as much as digits as its factorization.

655153217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31500, while the sum is 35.

The square root of 655153217 is about 25595.9609509000. The cubic root of 655153217 is about 868.5222710241.

The spelling of 655153217 in words is "six hundred fifty-five million, one hundred fifty-three thousand, two hundred seventeen".