106515491 has 4 divisors (see below), whose sum is σ = 106604232. Its totient is φ = 106426752.

The previous prime is 106515403. The next prime is 106515517. The reversal of 106515491 is 194515601.

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

It is a cyclic number.

It is not a de Polignac number, because 106515491 - 2²² = 102321187 is a prime.

It is a super-2 number, since 2×106515491² = 22691099645942162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106515091) 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, 42545 + ... + 44978.

It is an arithmetic number, because the mean of its divisors is an integer number (26651058).

Almost surely, 2^106515491 is an apocalyptic number.

106515491 is a deficient number, since it is larger than the sum of its proper divisors (88741).

106515491 is an equidigital number, since it uses as much as digits as its factorization.

106515491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88740.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 106515491 is about 10320.6342343870. The cubic root of 106515491 is about 474.0282864543.

The spelling of 106515491 in words is "one hundred six million, five hundred fifteen thousand, four hundred ninety-one".