23370221 has 4 divisors (see below), whose sum is σ = 26708832. Its totient is φ = 20031612.

The previous prime is 23370197. The next prime is 23370229. The reversal of 23370221 is 12207332.

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 not a de Polignac number, because 23370221 - 2¹⁰ = 23369197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23370193 and 23370202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23370229) 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, 1669295 + ... + 1669308.

It is an arithmetic number, because the mean of its divisors is an integer number (6677208).

Almost surely, 2^23370221 is an apocalyptic number.

It is an amenable number.

23370221 is a deficient number, since it is larger than the sum of its proper divisors (3338611).

23370221 is an equidigital number, since it uses as much as digits as its factorization.

23370221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3338610.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 23370221 is about 4834.2756437754. The cubic root of 23370221 is about 285.9044662745.

Adding to 23370221 its reverse (12207332), we get a palindrome (35577553).

The spelling of 23370221 in words is "twenty-three million, three hundred seventy thousand, two hundred twenty-one".