109622521 has 4 divisors (see below), whose sum is σ = 109771600. Its totient is φ = 109473444.

The previous prime is 109622507. The next prime is 109622549. The reversal of 109622521 is 125226901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109622521 is a prime.

It is a super-2 number, since 2×109622521² = 24034194220790882, which contains 22 as substring.

It is a deceptive number, since it divides R_109622520.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 109622521.

It is not an unprimeable number, because it can be changed into a prime (109622501) 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, 73431 + ... + 74908.

It is an arithmetic number, because the mean of its divisors is an integer number (27442900).

Almost surely, 2^109622521 is an apocalyptic number.

It is an amenable number.

109622521 is a deficient number, since it is larger than the sum of its proper divisors (149079).

109622521 is an equidigital number, since it uses as much as digits as its factorization.

109622521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149078.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 109622521 is about 10470.0774113662. The cubic root of 109622521 is about 478.5932786723.

The spelling of 109622521 in words is "one hundred nine million, six hundred twenty-two thousand, five hundred twenty-one".