105188431 has 4 divisors (see below), whose sum is σ = 105660352. Its totient is φ = 104716512.

The previous prime is 105188429. The next prime is 105188437. The reversal of 105188431 is 134881501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 105188431 - 2¹ = 105188429 is a prime.

It is a super-2 number, since 2×105188431² = 22129212032483522, 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 = 105188393 and 105188402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105188437) 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, 235626 + ... + 236071.

It is an arithmetic number, because the mean of its divisors is an integer number (26415088).

Almost surely, 2^105188431 is an apocalyptic number.

105188431 is a deficient number, since it is larger than the sum of its proper divisors (471921).

105188431 is an equidigital number, since it uses as much as digits as its factorization.

105188431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471920.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 105188431 is about 10256.1411359244. The cubic root of 105188431 is about 472.0514388424.

The spelling of 105188431 in words is "one hundred five million, one hundred eighty-eight thousand, four hundred thirty-one".