108221551 has 4 divisors (see below), whose sum is σ = 109704112. Its totient is φ = 106738992.

The previous prime is 108221539. The next prime is 108221557. The reversal of 108221551 is 155122801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155122801 = 43 ⋅3607507.

It is a cyclic number.

It is not a de Polignac number, because 108221551 - 2⁹ = 108221039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108221557) 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, 741171 + ... + 741316.

It is an arithmetic number, because the mean of its divisors is an integer number (27426028).

Almost surely, 2^108221551 is an apocalyptic number.

108221551 is a deficient number, since it is larger than the sum of its proper divisors (1482561).

108221551 is an equidigital number, since it uses as much as digits as its factorization.

108221551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482560.

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 108221551 is about 10402.9587618139. The cubic root of 108221551 is about 476.5457323299.

The spelling of 108221551 in words is "one hundred eight million, two hundred twenty-one thousand, five hundred fifty-one".