21525224301 has 12 divisors (see below), whose sum is σ = 35533703712. Its totient is φ = 12300128136.

The previous prime is 21525224293. The next prime is 21525224309. The reversal of 21525224301 is 10342252512.

It is an interprime number because it is at equal distance from previous prime (21525224293) and next prime (21525224309).

It is not a de Polignac number, because 21525224301 - 2³ = 21525224293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21525224309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170835051 + ... + 170835176.

It is an arithmetic number, because the mean of its divisors is an integer number (2961141976).

Almost surely, 2^21525224301 is an apocalyptic number.

21525224301 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21525224301 is a deficient number, since it is larger than the sum of its proper divisors (14008479411).

21525224301 is a wasteful number, since it uses less digits than its factorization.

21525224301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341670240 (or 341670237 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 21525224301 its reverse (10342252512), we get a palindrome (31867476813).

The spelling of 21525224301 in words is "twenty-one billion, five hundred twenty-five million, two hundred twenty-four thousand, three hundred one".