25211281316 has 24 divisors (see below), whose sum is σ = 50308486200. Its totient is φ = 10951506432.

The previous prime is 25211281301. The next prime is 25211281351. The reversal of 25211281316 is 61318211252.

It can be written as a sum of positive squares in 4 ways, for example, as 4734816100 + 20476465216 = 68810^2 + 143096^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14258891 + ... + 14260658.

It is an arithmetic number, because the mean of its divisors is an integer number (2096186925).

Almost surely, 2^25211281316 is an apocalyptic number.

25211281316 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

25211281316 is a deficient number, since it is larger than the sum of its proper divisors (25097204884).

25211281316 is a wasteful number, since it uses less digits than its factorization.

25211281316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28519583 (or 28519581 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

Adding to 25211281316 its reverse (61318211252), we get a palindrome (86529492568).

The spelling of 25211281316 in words is "twenty-five billion, two hundred eleven million, two hundred eighty-one thousand, three hundred sixteen".