24137221 has 2 divisors, whose sum is σ = 24137222. Its totient is φ = 24137220.

The previous prime is 24137213. The next prime is 24137227. The reversal of 24137221 is 12273142.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22896225 + 1240996 = 4785^2 + 1114^2 .

It is a cyclic number.

It is not a de Polignac number, because 24137221 - 2³ = 24137213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 24137192 and 24137201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24137227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12068610 + 12068611.

It is an arithmetic number, because the mean of its divisors is an integer number (12068611).

Almost surely, 2^24137221 is an apocalyptic number.

It is an amenable number.

24137221 is a deficient number, since it is larger than the sum of its proper divisors (1).

24137221 is an equidigital number, since it uses as much as digits as its factorization.

24137221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 22.

The square root of 24137221 is about 4912.9645836297. The cubic root of 24137221 is about 288.9986111211.

The spelling of 24137221 in words is "twenty-four million, one hundred thirty-seven thousand, two hundred twenty-one".