172224001 has 2 divisors, whose sum is σ = 172224002. Its totient is φ = 172224000.

The previous prime is 172223983. The next prime is 172224053. The reversal of 172224001 is 100422271.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123210000 + 49014001 = 11100^2 + 7001^2 .

It is a cyclic number.

It is not a de Polignac number, because 172224001 - 2⁷ = 172223873 is a prime.

It is a super-2 number, since 2×172224001² = 59322213040896002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 172224001.

It is not a weakly prime, because it can be changed into another prime (176224001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86112000 + 86112001.

It is an arithmetic number, because the mean of its divisors is an integer number (86112001).

Almost surely, 2^172224001 is an apocalyptic number.

It is an amenable number.

172224001 is a deficient number, since it is larger than the sum of its proper divisors (1).

172224001 is an equidigital number, since it uses as much as digits as its factorization.

172224001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 172224001 is about 13123.4142280125. The cubic root of 172224001 is about 556.3710936802.

Adding to 172224001 its reverse (100422271), we get a palindrome (272646272).

The spelling of 172224001 in words is "one hundred seventy-two million, two hundred twenty-four thousand, one".