109231540 has 36 divisors (see below), whose sum is σ = 252140868. Its totient is φ = 39719680.

The previous prime is 109231537. The next prime is 109231547. The reversal of 109231540 is 45132901.

It can be written as a sum of positive squares in 2 ways, for example, as 26275876 + 82955664 = 5126^2 + 9108^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109231547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20149 + ... + 24988.

It is an arithmetic number, because the mean of its divisors is an integer number (7003913).

Almost surely, 2^109231540 is an apocalyptic number.

109231540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109231540 is an abundant number, since it is smaller than the sum of its proper divisors (142909328).

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

109231540 is a wasteful number, since it uses less digits than its factorization.

109231540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45168 (or 45155 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 109231540 is about 10451.3893813215. The cubic root of 109231540 is about 478.0236153666.

The spelling of 109231540 in words is "one hundred nine million, two hundred thirty-one thousand, five hundred forty".