21541462231025 has 24 divisors (see below), whose sum is σ = 29139933362400. Its totient is φ = 15666405132800.

The previous prime is 21541462230991. The next prime is 21541462231103. The reversal of 21541462231025 is 52013226414512.

It is not a de Polignac number, because 21541462231025 - 2¹² = 21541462226929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21541462231025.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67639361 + ... + 67957089.

It is an arithmetic number, because the mean of its divisors is an integer number (1214163890100).

Almost surely, 2^{21541462231025} is an apocalyptic number.

21541462231025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21541462231025 is a deficient number, since it is larger than the sum of its proper divisors (7598471131375).

21541462231025 is a wasteful number, since it uses less digits than its factorization.

21541462231025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564289 (or 564284 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

Adding to 21541462231025 its reverse (52013226414512), we get a palindrome (73554688645537).

The spelling of 21541462231025 in words is "twenty-one trillion, five hundred forty-one billion, four hundred sixty-two million, two hundred thirty-one thousand, twenty-five".