23221135 has 16 divisors (see below), whose sum is σ = 33523200. Its totient is φ = 15084576.

The previous prime is 23221123. The next prime is 23221147. The reversal of 23221135 is 53112232.

23221135 = T₈₇₄ + T₈₇₅ + ... + T₉₃₀.

It is an interprime number because it is at equal distance from previous prime (23221123) and next prime (23221147).

It is a cyclic number.

It is not a de Polignac number, because 23221135 - 2⁵ = 23221103 is a prime.

It is a super-2 number, since 2×23221135² = 1078442221376450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16795 + ... + 18124.

It is an arithmetic number, because the mean of its divisors is an integer number (2095200).

Almost surely, 2^23221135 is an apocalyptic number.

23221135 is a deficient number, since it is larger than the sum of its proper divisors (10302065).

23221135 is a wasteful number, since it uses less digits than its factorization.

23221135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34950.

The product of its digits is 360, while the sum is 19.

The square root of 23221135 is about 4818.8312898461. The cubic root of 23221135 is about 285.2952106764.

Adding to 23221135 its reverse (53112232), we get a palindrome (76333367).

The spelling of 23221135 in words is "twenty-three million, two hundred twenty-one thousand, one hundred thirty-five".