24722521 has 2 divisors, whose sum is σ = 24722522. Its totient is φ = 24722520.

The previous prime is 24722519. The next prime is 24722543. The reversal of 24722521 is 12522742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24641296 + 81225 = 4964^2 + 285^2 .

It is a cyclic number.

It is not a de Polignac number, because 24722521 - 2¹ = 24722519 is a prime.

It is a super-2 number, since 2×24722521² = 1222406089190882, which contains 22 as substring.

Together with 24722519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (24722921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12361260 + 12361261.

It is an arithmetic number, because the mean of its divisors is an integer number (12361261).

Almost surely, 2^24722521 is an apocalyptic number.

It is an amenable number.

24722521 is a deficient number, since it is larger than the sum of its proper divisors (1).

24722521 is an equidigital number, since it uses as much as digits as its factorization.

24722521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240, while the sum is 25.

The square root of 24722521 is about 4972.1746751296. The cubic root of 24722521 is about 291.3159418926.

The spelling of 24722521 in words is "twenty-four million, seven hundred twenty-two thousand, five hundred twenty-one".