172226412 has 120 divisors (see below), whose sum is σ = 480350640. Its totient is φ = 53654400.

The previous prime is 172226401. The next prime is 172226423. The reversal of 172226412 is 214622271.

172226412 is a `hidden beast` number, since 17 + 2 + 2 + 2 + 641 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (172226401) and next prime (172226423).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 621618 + ... + 621894.

It is an arithmetic number, because the mean of its divisors is an integer number (4002922).

Almost surely, 2^172226412 is an apocalyptic number.

172226412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172226412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240175320).

172226412 is an abundant number, since it is smaller than the sum of its proper divisors (308124228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172226412 is a wasteful number, since it uses less digits than its factorization.

172226412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413 (or 402 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 172226412 is about 13123.5060864085. The cubic root of 172226412 is about 556.3736899200.

Adding to 172226412 its reverse (214622271), we get a palindrome (386848683).

The spelling of 172226412 in words is "one hundred seventy-two million, two hundred twenty-six thousand, four hundred twelve".