25701321225 has 48 divisors (see below), whose sum is σ = 45034028352. Its totient is φ = 12889128960.

The previous prime is 25701321199. The next prime is 25701321241. The reversal of 25701321225 is 52212310752.

It is not a de Polignac number, because 25701321225 - 2¹⁰ = 25701320201 is a prime.

It is a super-3 number, since 3×25701321225³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25701321192 and 25701321201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1461334 + ... + 1478816.

It is an arithmetic number, because the mean of its divisors is an integer number (938208924).

Almost surely, 2^25701321225 is an apocalyptic number.

25701321225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25701321225 is a deficient number, since it is larger than the sum of its proper divisors (19332707127).

25701321225 is a wasteful number, since it uses less digits than its factorization.

25701321225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18666 (or 18661 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

Adding to 25701321225 its reverse (52212310752), we get a palindrome (77913631977).

The spelling of 25701321225 in words is "twenty-five billion, seven hundred one million, three hundred twenty-one thousand, two hundred twenty-five".