172822553 has 2 divisors, whose sum is σ = 172822554. Its totient is φ = 172822552.

The previous prime is 172822511. The next prime is 172822607. The reversal of 172822553 is 355228271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130142464 + 42680089 = 11408^2 + 6533^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172822553 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (172821553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86411276 + 86411277.

It is an arithmetic number, because the mean of its divisors is an integer number (86411277).

Almost surely, 2^172822553 is an apocalyptic number.

It is an amenable number.

172822553 is a deficient number, since it is larger than the sum of its proper divisors (1).

172822553 is an equidigital number, since it uses as much as digits as its factorization.

172822553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 35.

The square root of 172822553 is about 13146.1991845552. The cubic root of 172822553 is about 557.0148908667.

The spelling of 172822553 in words is "one hundred seventy-two million, eight hundred twenty-two thousand, five hundred fifty-three".