25478031 has 8 divisors (see below), whose sum is σ = 35758720. Its totient is φ = 16091352.

The previous prime is 25478009. The next prime is 25478051. The reversal of 25478031 is 13087452.

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

It is not a de Polignac number, because 25478031 - 2⁵ = 25477999 is a prime.

It is a super-2 number, since 2×25478031² = 1298260127273922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25478031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25478051) 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, 223435 + ... + 223548.

It is an arithmetic number, because the mean of its divisors is an integer number (4469840).

Almost surely, 2^25478031 is an apocalyptic number.

25478031 is a deficient number, since it is larger than the sum of its proper divisors (10280689).

25478031 is a wasteful number, since it uses less digits than its factorization.

25478031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447005.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 25478031 is about 5047.5767453304. The cubic root of 25478031 is about 294.2537145340.

The spelling of 25478031 in words is "twenty-five million, four hundred seventy-eight thousand, thirty-one".