109212523 has 24 divisors (see below), whose sum is σ = 130507200. Its totient is φ = 91099008.

The previous prime is 109212517. The next prime is 109212529. The reversal of 109212523 is 325212901.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (109212517) and next prime (109212529).

It is not a de Polignac number, because 109212523 - 2⁵ = 109212491 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109212529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 344361 + ... + 344677.

It is an arithmetic number, because the mean of its divisors is an integer number (5437800).

Almost surely, 2^109212523 is an apocalyptic number.

109212523 is a deficient number, since it is larger than the sum of its proper divisors (21294677).

109212523 is an equidigital number, since it uses as much as digits as its factorization.

109212523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499 (or 492 counting only the distinct ones).

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

The square root of 109212523 is about 10450.4795583743. The cubic root of 109212523 is about 477.9958727607.

The spelling of 109212523 in words is "one hundred nine million, two hundred twelve thousand, five hundred twenty-three".