106221506 has 4 divisors (see below), whose sum is σ = 159332262. Its totient is φ = 53110752.

The previous prime is 106221449. The next prime is 106221523. The reversal of 106221506 is 605122601.

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., 92833225 + 13388281 = 9635^2 + 3659^2 .

It is a super-2 number, since 2×106221506² = 22566016673816072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26555375 + ... + 26555378.

Almost surely, 2^106221506 is an apocalyptic number.

106221506 is a deficient number, since it is larger than the sum of its proper divisors (53110756).

106221506 is an equidigital number, since it uses as much as digits as its factorization.

106221506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53110755.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 106221506 is about 10306.3818093451. The cubic root of 106221506 is about 473.5917752606.

The spelling of 106221506 in words is "one hundred six million, two hundred twenty-one thousand, five hundred six".