25229385 has 12 divisors (see below), whose sum is σ = 43731012. Its totient is φ = 13455648.

The previous prime is 25229383. The next prime is 25229389. The reversal of 25229385 is 58392252.

25229385 is a `hidden beast` number, since 252 + 29 + 385 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3968064 + 21261321 = 1992^2 + 4611^2 .

It is not a de Polignac number, because 25229385 - 2¹ = 25229383 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (25229383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 280282 + ... + 280371.

It is an arithmetic number, because the mean of its divisors is an integer number (3644251).

Almost surely, 2^25229385 is an apocalyptic number.

It is an amenable number.

25229385 is a deficient number, since it is larger than the sum of its proper divisors (18501627).

25229385 is a wasteful number, since it uses less digits than its factorization.

25229385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560664 (or 560661 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 25229385 is about 5022.8861225395. The cubic root of 25229385 is about 293.2933535675.

The spelling of 25229385 in words is "twenty-five million, two hundred twenty-nine thousand, three hundred eighty-five".