106558138 has 4 divisors (see below), whose sum is σ = 159837210. Its totient is φ = 53279068.

The previous prime is 106558121. The next prime is 106558141. The reversal of 106558138 is 831855601.

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

It can be written as a sum of positive squares in only one way, i.e., 106440489 + 117649 = 10317^2 + 343^2 .

It is a super-2 number, since 2×106558138² = 22709273548054088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 106558097 and 106558106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26639533 + ... + 26639536.

Almost surely, 2^106558138 is an apocalyptic number.

106558138 is a deficient number, since it is larger than the sum of its proper divisors (53279072).

106558138 is an equidigital number, since it uses as much as digits as its factorization.

106558138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53279071.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 106558138 is about 10322.7001312641. The cubic root of 106558138 is about 474.0915423141.

Subtracting from 106558138 its sum of digits (37), we obtain a triangular number (106558101 = T₁₄₅₉₈).

The spelling of 106558138 in words is "one hundred six million, five hundred fifty-eight thousand, one hundred thirty-eight".