172423011 has 4 divisors (see below), whose sum is σ = 229897352. Its totient is φ = 114948672.

The previous prime is 172423001. The next prime is 172423021. The reversal of 172423011 is 110324271.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (172423001) and next prime (172423021).

It is not a de Polignac number, because 172423011 - 2⁹ = 172422499 is a prime.

It is a super-2 number, since 2×172423011² = 59459389444612242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172423001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28737166 + ... + 28737171.

It is an arithmetic number, because the mean of its divisors is an integer number (57474338).

Almost surely, 2^172423011 is an apocalyptic number.

172423011 is a deficient number, since it is larger than the sum of its proper divisors (57474341).

172423011 is an equidigital number, since it uses as much as digits as its factorization.

172423011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57474340.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 172423011 is about 13130.9942883241. The cubic root of 172423011 is about 556.5853123528.

Adding to 172423011 its reverse (110324271), we get a palindrome (282747282).

The spelling of 172423011 in words is "one hundred seventy-two million, four hundred twenty-three thousand, eleven".