172201641 has 4 divisors (see below), whose sum is σ = 229602192. Its totient is φ = 114801092.

The previous prime is 172201639. The next prime is 172201643. The reversal of 172201641 is 146102271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (172201639) and next prime (172201643).

It is a cyclic number.

It is not a de Polignac number, because 172201641 - 2¹ = 172201639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172201643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28700271 + ... + 28700276.

It is an arithmetic number, because the mean of its divisors is an integer number (57400548).

Almost surely, 2^172201641 is an apocalyptic number.

It is an amenable number.

172201641 is a deficient number, since it is larger than the sum of its proper divisors (57400551).

172201641 is an equidigital number, since it uses as much as digits as its factorization.

172201641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57400550.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 172201641 is about 13122.5622879070. The cubic root of 172201641 is about 556.3470145816.

The spelling of 172201641 in words is "one hundred seventy-two million, two hundred one thousand, six hundred forty-one".