24540155 has 4 divisors (see below), whose sum is σ = 29448192. Its totient is φ = 19632120.

The previous prime is 24540137. The next prime is 24540169. The reversal of 24540155 is 55104542.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 24540155 - 2¹⁸ = 24278011 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2454011 + ... + 2454020.

It is an arithmetic number, because the mean of its divisors is an integer number (7362048).

Almost surely, 2^24540155 is an apocalyptic number.

24540155 is a deficient number, since it is larger than the sum of its proper divisors (4908037).

24540155 is an equidigital number, since it uses as much as digits as its factorization.

24540155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4908036.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 24540155 is about 4953.8020751742. The cubic root of 24540155 is about 290.5978747567.

Adding to 24540155 its reverse (55104542), we get a palindrome (79644697).

The spelling of 24540155 in words is "twenty-four million, five hundred forty thousand, one hundred fifty-five".