109213172 has 12 divisors (see below), whose sum is σ = 191256996. Its totient is φ = 54568320.

The previous prime is 109213171. The next prime is 109213187. The reversal of 109213172 is 271312901.

It can be written as a sum of positive squares in 2 ways, for example, as 18696976 + 90516196 = 4324^2 + 9514^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109213171) 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, 2579 + ... + 15002.

It is an arithmetic number, because the mean of its divisors is an integer number (15938083).

Almost surely, 2^109213172 is an apocalyptic number.

It is an amenable number.

109213172 is a deficient number, since it is larger than the sum of its proper divisors (82043824).

109213172 is a wasteful number, since it uses less digits than its factorization.

109213172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19138 (or 19136 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 109213172 is about 10450.5106095348. The cubic root of 109213172 is about 477.9968195957.

The spelling of 109213172 in words is "one hundred nine million, two hundred thirteen thousand, one hundred seventy-two".