24780213 has 12 divisors (see below), whose sum is σ = 36381228. Its totient is φ = 16248960.

The previous prime is 24780211. The next prime is 24780241. The reversal of 24780213 is 31208742.

It can be written as a sum of positive squares in 2 ways, for example, as 1912689 + 22867524 = 1383^2 + 4782^2 .

It is not a de Polignac number, because 24780213 - 2¹ = 24780211 is a prime.

It is a super-2 number, since 2×24780213² = 1228117912650738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24780211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22020 + ... + 23117.

It is an arithmetic number, because the mean of its divisors is an integer number (3031769).

Almost surely, 2^24780213 is an apocalyptic number.

It is an amenable number.

24780213 is a deficient number, since it is larger than the sum of its proper divisors (11601015).

24780213 is a wasteful number, since it uses less digits than its factorization.

24780213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45204 (or 45201 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 24780213 is about 4977.9727801586. The cubic root of 24780213 is about 291.5423689502.

Adding to 24780213 its reverse (31208742), we get a palindrome (55988955).

The spelling of 24780213 in words is "twenty-four million, seven hundred eighty thousand, two hundred thirteen".