25218054 has 48 divisors (see below), whose sum is σ = 59666880. Its totient is φ = 7960680.

The previous prime is 25218041. The next prime is 25218077. The reversal of 25218054 is 45081252.

It is a happy number.

It is a super-4 number, since 4×25218054⁴ (a number of 31 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7869 + ... + 10599.

It is an arithmetic number, because the mean of its divisors is an integer number (1243060).

Almost surely, 2^25218054 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25218054, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29833440).

25218054 is an abundant number, since it is smaller than the sum of its proper divisors (34448826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25218054 is a wasteful number, since it uses less digits than its factorization.

25218054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2767 (or 2755 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 25218054 is about 5021.7580586882. The cubic root of 25218054 is about 293.2494391052.

The spelling of 25218054 in words is "twenty-five million, two hundred eighteen thousand, fifty-four".