21253100262425 has 24 divisors (see below), whose sum is σ = 26363029149216. Its totient is φ = 16996555754240.

The previous prime is 21253100262421. The next prime is 21253100262451. The reversal of 21253100262425 is 52426200135212.

It is a happy number.

It is not a de Polignac number, because 21253100262425 - 2² = 21253100262421 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21253100262421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1441173902 + ... + 1441188648.

It is an arithmetic number, because the mean of its divisors is an integer number (1098459547884).

Almost surely, 2^{21253100262425} is an apocalyptic number.

21253100262425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21253100262425 is a deficient number, since it is larger than the sum of its proper divisors (5109928886791).

21253100262425 is a wasteful number, since it uses less digits than its factorization.

21253100262425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30937 (or 30932 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 21253100262425 its reverse (52426200135212), we get a palindrome (73679300397637).

The spelling of 21253100262425 in words is "twenty-one trillion, two hundred fifty-three billion, one hundred million, two hundred sixty-two thousand, four hundred twenty-five".