25540471 has 8 divisors (see below), whose sum is σ = 28615824. Its totient is φ = 22590720.

The previous prime is 25540453. The next prime is 25540483. The reversal of 25540471 is 17404552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25540471 - 2¹¹ = 25538423 is a prime.

It is a super-3 number, since 3×25540471³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25540421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30970 + ... + 31783.

It is an arithmetic number, because the mean of its divisors is an integer number (3576978).

Almost surely, 2^25540471 is an apocalyptic number.

25540471 is a deficient number, since it is larger than the sum of its proper divisors (3075353).

25540471 is a wasteful number, since it uses less digits than its factorization.

25540471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62801.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 25540471 is about 5053.7581065975. The cubic root of 25540471 is about 294.4938981002.

The spelling of 25540471 in words is "twenty-five million, five hundred forty thousand, four hundred seventy-one".