25440153 has 4 divisors (see below), whose sum is σ = 33920208. Its totient is φ = 16960100.

The previous prime is 25440091. The next prime is 25440167. The reversal of 25440153 is 35104452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25440153 - 2¹³ = 25431961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25440193) 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, 4240023 + ... + 4240028.

It is an arithmetic number, because the mean of its divisors is an integer number (8480052).

Almost surely, 2^25440153 is an apocalyptic number.

It is an amenable number.

25440153 is a deficient number, since it is larger than the sum of its proper divisors (8480055).

25440153 is an equidigital number, since it uses as much as digits as its factorization.

25440153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8480054.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 25440153 is about 5043.8232522562. The cubic root of 25440153 is about 294.1078206043.

The spelling of 25440153 in words is "twenty-five million, four hundred forty thousand, one hundred fifty-three".