172221777053 has 2 divisors, whose sum is σ = 172221777054. Its totient is φ = 172221777052.

The previous prime is 172221777041. The next prime is 172221777059. The reversal of 172221777053 is 350777122271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157131374404 + 15090402649 = 396398^2 + 122843^2 .

It is a cyclic number.

It is not a de Polignac number, because 172221777053 - 2¹⁶ = 172221711517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172221776995 and 172221777013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172221777059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86110888526 + 86110888527.

It is an arithmetic number, because the mean of its divisors is an integer number (86110888527).

Almost surely, 2^172221777053 is an apocalyptic number.

It is an amenable number.

172221777053 is a deficient number, since it is larger than the sum of its proper divisors (1).

172221777053 is an equidigital number, since it uses as much as digits as its factorization.

172221777053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288120, while the sum is 44.

The spelling of 172221777053 in words is "one hundred seventy-two billion, two hundred twenty-one million, seven hundred seventy-seven thousand, fifty-three".