172146422 has 32 divisors (see below), whose sum is σ = 319054080. Its totient is φ = 68001120.

The previous prime is 172146409. The next prime is 172146427. The reversal of 172146422 is 224641271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172146427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1097 + ... + 18587.

It is an arithmetic number, because the mean of its divisors is an integer number (9970440).

Almost surely, 2^172146422 is an apocalyptic number.

172146422 is a deficient number, since it is larger than the sum of its proper divisors (146907658).

172146422 is a wasteful number, since it uses less digits than its factorization.

172146422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17556.

The product of its digits is 5376, while the sum is 29.

The square root of 172146422 is about 13120.4581474886. The cubic root of 172146422 is about 556.2875412613.

Adding to 172146422 its reverse (224641271), we get a palindrome (396787693).

The spelling of 172146422 in words is "one hundred seventy-two million, one hundred forty-six thousand, four hundred twenty-two".