172224553 has 2 divisors, whose sum is σ = 172224554. Its totient is φ = 172224552.

The previous prime is 172224541. The next prime is 172224581. The reversal of 172224553 is 355422271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139996224 + 32228329 = 11832^2 + 5677^2 .

It is a cyclic number.

It is not a de Polignac number, because 172224553 - 2²⁵ = 138670121 is a prime.

It is a super-2 number, since 2×172224553² = 59322593312099618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (172224053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86112276 + 86112277.

It is an arithmetic number, because the mean of its divisors is an integer number (86112277).

Almost surely, 2^172224553 is an apocalyptic number.

It is an amenable number.

172224553 is a deficient number, since it is larger than the sum of its proper divisors (1).

172224553 is an equidigital number, since it uses as much as digits as its factorization.

172224553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 31.

The square root of 172224553 is about 13123.4352591080. The cubic root of 172224553 is about 556.3716880931.

The spelling of 172224553 in words is "one hundred seventy-two million, two hundred twenty-four thousand, five hundred fifty-three".