105200031 has 4 divisors (see below), whose sum is σ = 140266712. Its totient is φ = 70133352.

The previous prime is 105200003. The next prime is 105200041. The reversal of 105200031 is 130002501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130002501 = 3 ⋅43334167.

It is not a de Polignac number, because 105200031 - 2¹³ = 105191839 is a prime.

It is a super-2 number, since 2×105200031² = 22134093044801922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105200041) 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, 17533336 + ... + 17533341.

It is an arithmetic number, because the mean of its divisors is an integer number (35066678).

Almost surely, 2^105200031 is an apocalyptic number.

105200031 is a deficient number, since it is larger than the sum of its proper divisors (35066681).

105200031 is an equidigital number, since it uses as much as digits as its factorization.

105200031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35066680.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 105200031 is about 10256.7066351729. The cubic root of 105200031 is about 472.0687905459.

Adding to 105200031 its reverse (130002501), we get a palindrome (235202532).

The spelling of 105200031 in words is "one hundred five million, two hundred thousand, thirty-one".