105211090 has 16 divisors (see below), whose sum is σ = 189518040. Its totient is φ = 42053760.

The previous prime is 105211081. The next prime is 105211109. The reversal of 105211090 is 90112501.

It can be written as a sum of positive squares in 4 ways, for example, as 105206049 + 5041 = 10257^2 + 71^2 .

It is a super-2 number, since 2×105211090² = 22138746917976200, 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, 14950 + ... + 20830.

Almost surely, 2^105211090 is an apocalyptic number.

105211090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

105211090 is a deficient number, since it is larger than the sum of its proper divisors (84306950).

105211090 is a wasteful number, since it uses less digits than its factorization.

105211090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7677.

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 105211090 is about 10257.2457316767. The cubic root of 105211090 is about 472.0853318143.

Adding to 105211090 its reverse (90112501), we get a palindrome (195323591).

It can be divided in two parts, 10521 and 1090, that added together give a palindrome (11611).

The spelling of 105211090 in words is "one hundred five million, two hundred eleven thousand, ninety".