25211354525 has 12 divisors (see below), whose sum is σ = 35728091232. Its totient is φ = 17287785840.

The previous prime is 25211354513. The next prime is 25211354549. The reversal of 25211354525 is 52545311252.

It is a happy number.

It is not a de Polignac number, because 25211354525 - 2⁶ = 25211354461 is a prime.

It is a super-2 number, since 2×25211354525² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72032267 + ... + 72032616.

It is an arithmetic number, because the mean of its divisors is an integer number (2977340936).

Almost surely, 2^25211354525 is an apocalyptic number.

25211354525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25211354525 is a deficient number, since it is larger than the sum of its proper divisors (10516736707).

25211354525 is a wasteful number, since it uses less digits than its factorization.

25211354525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144064900 (or 144064895 counting only the distinct ones).

The product of its digits is 60000, while the sum is 35.

Adding to 25211354525 its reverse (52545311252), we get a palindrome (77756665777).

The spelling of 25211354525 in words is "twenty-five billion, two hundred eleven million, three hundred fifty-four thousand, five hundred twenty-five".