109631531 has 4 divisors (see below), whose sum is σ = 113168064. Its totient is φ = 106095000.

The previous prime is 109631491. The next prime is 109631537. The reversal of 109631531 is 135136901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135136901 = 167 ⋅809203.

It is a cyclic number.

It is not a de Polignac number, because 109631531 - 2¹⁴ = 109615147 is a prime.

It is a super-2 number, since 2×109631531² = 24038145178807922, 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 = 109631494 and 109631503.

It is not an unprimeable number, because it can be changed into a prime (109631537) 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, 1768220 + ... + 1768281.

It is an arithmetic number, because the mean of its divisors is an integer number (28292016).

Almost surely, 2^109631531 is an apocalyptic number.

109631531 is a deficient number, since it is larger than the sum of its proper divisors (3536533).

109631531 is an equidigital number, since it uses as much as digits as its factorization.

109631531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536532.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 109631531 is about 10470.5076763259. The cubic root of 109631531 is about 478.6063903555.

The spelling of 109631531 in words is "one hundred nine million, six hundred thirty-one thousand, five hundred thirty-one".