109231531 has 8 divisors (see below), whose sum is σ = 114120864. Its totient is φ = 104353920.

The previous prime is 109231523. The next prime is 109231537. The reversal of 109231531 is 135132901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 109231531 - 2³ = 109231523 is a prime.

It is a super-2 number, since 2×109231531² = 23863054729207922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 109231496 and 109231505.

It is not an unprimeable number, because it can be changed into a prime (109231537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20041 + ... + 24901.

It is an arithmetic number, because the mean of its divisors is an integer number (14265108).

Almost surely, 2^109231531 is an apocalyptic number.

109231531 is a deficient number, since it is larger than the sum of its proper divisors (4889333).

109231531 is an equidigital number, since it uses as much as digits as its factorization.

109231531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5861.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 109231531 is about 10451.3889507567. The cubic root of 109231531 is about 478.0236022379.

It can be divided in two parts, 1092 and 31531, that added together give a palindrome (32623).

The spelling of 109231531 in words is "one hundred nine million, two hundred thirty-one thousand, five hundred thirty-one".