105731090 has 16 divisors (see below), whose sum is σ = 192063960. Its totient is φ = 41904000.

The previous prime is 105731081. The next prime is 105731113. The reversal of 105731090 is 90137501.

It can be written as a sum of positive squares in 4 ways, for example, as 100260169 + 5470921 = 10013^2 + 2339^2 .

It is a super-2 number, since 2×105731090² = 22358126785176200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47411 + ... + 49590.

Almost surely, 2^105731090 is an apocalyptic number.

105731090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

105731090 is a deficient number, since it is larger than the sum of its proper divisors (86332870).

105731090 is a wasteful number, since it uses less digits than its factorization.

105731090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97117.

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 105731090 is about 10282.5624238319. The cubic root of 105731090 is about 472.8618058799.

Adding to 105731090 its reverse (90137501), we get a palindrome (195868591).

The spelling of 105731090 in words is "one hundred five million, seven hundred thirty-one thousand, ninety".