23619221 has 2 divisors, whose sum is σ = 23619222. Its totient is φ = 23619220.

The previous prime is 23619217. The next prime is 23619247. The reversal of 23619221 is 12291632.

It is an a-pointer prime, because the next prime (23619247) can be obtained adding 23619221 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23522500 + 96721 = 4850^2 + 311^2 .

It is a cyclic number.

It is not a de Polignac number, because 23619221 - 2² = 23619217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23619121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11809610 + 11809611.

It is an arithmetic number, because the mean of its divisors is an integer number (11809611).

Almost surely, 2^23619221 is an apocalyptic number.

It is an amenable number.

23619221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23619221 is an equidigital number, since it uses as much as digits as its factorization.

23619221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 23619221 is about 4859.9610080740. The cubic root of 23619221 is about 286.9162790438.

The spelling of 23619221 in words is "twenty-three million, six hundred nineteen thousand, two hundred twenty-one".