25443155 has 4 divisors (see below), whose sum is σ = 30531792. Its totient is φ = 20354520.

The previous prime is 25443151. The next prime is 25443167. The reversal of 25443155 is 55134452.

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

It is not a de Polignac number, because 25443155 - 2² = 25443151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25443151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2544311 + ... + 2544320.

It is an arithmetic number, because the mean of its divisors is an integer number (7632948).

Almost surely, 2^25443155 is an apocalyptic number.

25443155 is a deficient number, since it is larger than the sum of its proper divisors (5088637).

25443155 is an equidigital number, since it uses as much as digits as its factorization.

25443155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5088636.

The product of its digits is 12000, while the sum is 29.

The square root of 25443155 is about 5044.1208351902. The cubic root of 25443155 is about 294.1193886289.

The spelling of 25443155 in words is "twenty-five million, four hundred forty-three thousand, one hundred fifty-five".