105131090 has 16 divisors (see below), whose sum is σ = 195761880. Its totient is φ = 40602240.

The previous prime is 105131071. The next prime is 105131129. The reversal of 105131090 is 90131501.

It can be written as a sum of positive squares in 4 ways, for example, as 49970761 + 55160329 = 7069^2 + 7427^2 .

It is a super-2 number, since 2×105131090² = 22105092169176200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180971 + ... + 181550.

Almost surely, 2^105131090 is an apocalyptic number.

105131090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

105131090 is a deficient number, since it is larger than the sum of its proper divisors (90630790).

105131090 is a wasteful number, since it uses less digits than its factorization.

105131090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362557.

The product of its (nonzero) digits is 135, while the sum is 20.

The square root of 105131090 is about 10253.3453077520. The cubic root of 105131090 is about 471.9656473370.

Adding to 105131090 its reverse (90131501), we get a palindrome (195262591).

The spelling of 105131090 in words is "one hundred five million, one hundred thirty-one thousand, ninety".