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25150225 = 52172592
BaseRepresentation
bin101111111110…
…0001100010001
31202022202121211
41133330030101
522414301400
62255020121
7423526162
oct137741421
952282554
1025150225
1113218811
12850a641
1352976b9
1434a9769
15231bdba
hex17fc311

25150225 has 27 divisors (see below), whose sum is σ = 33699697. Its totient is φ = 18615680.

The previous prime is 25150219. The next prime is 25150283. The reversal of 25150225 is 52205152.

The square root of 25150225 is 5015.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 588289 + 24561936 = 767^2 + 4956^2 .

It is not a de Polignac number, because 25150225 - 25 = 25150193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25150196 and 25150205.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 426246 + ... + 426304.

Almost surely, 225150225 is an apocalyptic number.

25150225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25150225 is the 5015-th square number.

25150225 is the 2508-th centered octagonal number.

It is an amenable number.

25150225 is a deficient number, since it is larger than the sum of its proper divisors (8549472).

25150225 is an equidigital number, since it uses as much as digits as its factorization.

25150225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The cubic root of 25150225 is about 292.9862853563.

Adding to 25150225 its reverse (52205152), we get a palindrome (77355377).

The spelling of 25150225 in words is "twenty-five million, one hundred fifty thousand, two hundred twenty-five".