103211172 has 60 divisors (see below), whose sum is σ = 271666780. Its totient is φ = 34167744.

The previous prime is 103211153. The next prime is 103211197. The reversal of 103211172 is 271112301.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 75585636 + 27625536 = 8694^2 + 5256^2 .

It is a super-2 number, since 2×103211172² = 21305092051227168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49854 + ... + 51882.

Almost surely, 2^103211172 is an apocalyptic number.

103211172 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 103211172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135833390).

103211172 is an abundant number, since it is smaller than the sum of its proper divisors (168455608).

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

103211172 is a wasteful number, since it uses less digits than its factorization.

103211172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2202 (or 2191 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 103211172 is about 10159.2899358174. The cubic root of 103211172 is about 469.0749452505.

Adding to 103211172 its reverse (271112301), we get a palindrome (374323473).

The spelling of 103211172 in words is "one hundred three million, two hundred eleven thousand, one hundred seventy-two".