2278630225 has 9 divisors (see below), whose sum is σ = 2825797467. Its totient is φ = 1822713240.

The previous prime is 2278630213. The next prime is 2278630273. The reversal of 2278630225 is 5220368722.

The square root of 2278630225 is 47735.

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

It can be written as a sum of positive squares in only one way, i.e., 820306881 + 1458323344 = 28641^2 + 38188^2 .

It is not a de Polignac number, because 2278630225 - 2¹³ = 2278622033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 233902 + ... + 243448.

Almost surely, 2^2278630225 is an apocalyptic number.

2278630225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2278630225 is the 47735-th square number.

2278630225 is the 23868-th centered octagonal number.

It is an amenable number.

2278630225 is a deficient number, since it is larger than the sum of its proper divisors (547167242).

2278630225 is an frugal number, since it uses more digits than its factorization.

2278630225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19104 (or 9552 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The cubic root of 2278630225 is about 1315.9052449229.

Adding to 2278630225 its reverse (5220368722), we get a palindrome (7498998947).

The spelling of 2278630225 in words is "two billion, two hundred seventy-eight million, six hundred thirty thousand, two hundred twenty-five".