109251220 has 48 divisors (see below), whose sum is σ = 248935680. Its totient is φ = 40035456.

The previous prime is 109251187. The next prime is 109251253. The reversal of 109251220 is 22152901.

It is an interprime number because it is at equal distance from previous prime (109251187) and next prime (109251253).

It is a junction number, because it is equal to n+sod(n) for n = 109251191 and 109251200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34629 + ... + 37651.

It is an arithmetic number, because the mean of its divisors is an integer number (5186160).

Almost surely, 2^109251220 is an apocalyptic number.

109251220 is a gapful number since it is divisible by the number (10) 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 109251220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124467840).

109251220 is an abundant number, since it is smaller than the sum of its proper divisors (139684460).

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

109251220 is a wasteful number, since it uses less digits than its factorization.

109251220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184 (or 3182 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 109251220 is about 10452.3308405350. The cubic root of 109251220 is about 478.0523217879.

The spelling of 109251220 in words is "one hundred nine million, two hundred fifty-one thousand, two hundred twenty".