25311219025 has 27 divisors (see below), whose sum is σ = 32115342769. Its totient is φ = 19788872480.

The previous prime is 25311219023. The next prime is 25311219049. The reversal of 25311219025 is 52091211352.

The square root of 25311219025 is 159095.

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 7292989201 + 18018229824 = 85399^2 + 134232^2 .

It is not a de Polignac number, because 25311219025 - 2¹ = 25311219023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25311219023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 37386987 + ... + 37387663.

Almost surely, 2^25311219025 is an apocalyptic number.

25311219025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25311219025 is the 159095-th square number.

25311219025 is the 79548-th centered octagonal number.

It is an amenable number.

25311219025 is a deficient number, since it is larger than the sum of its proper divisors (6804123744).

25311219025 is an frugal number, since it uses more digits than its factorization.

25311219025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 25311219025 in words is "twenty-five billion, three hundred eleven million, two hundred nineteen thousand, twenty-five".