105631143 has 4 divisors (see below), whose sum is σ = 140841528. Its totient is φ = 70420760.

The previous prime is 105631139. The next prime is 105631147. The reversal of 105631143 is 341136501.

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

It is an interprime number because it is at equal distance from previous prime (105631139) and next prime (105631147).

It is a cyclic number.

It is not a de Polignac number, because 105631143 - 2² = 105631139 is a prime.

It is a super-2 number, since 2×105631143² = 22315876742972898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105631147) 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, 17605188 + ... + 17605193.

It is an arithmetic number, because the mean of its divisors is an integer number (35210382).

Almost surely, 2^105631143 is an apocalyptic number.

105631143 is a deficient number, since it is larger than the sum of its proper divisors (35210385).

105631143 is an equidigital number, since it uses as much as digits as its factorization.

105631143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35210384.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 105631143 is about 10277.7012507661. The cubic root of 105631143 is about 472.7127610448.

Adding to 105631143 its reverse (341136501), we get a palindrome (446767644).

The spelling of 105631143 in words is "one hundred five million, six hundred thirty-one thousand, one hundred forty-three".