21523042225051 has 8 divisors (see below), whose sum is σ = 21840240427520. Its totient is φ = 21206962888488.

The previous prime is 21523042225043. The next prime is 21523042225063. The reversal of 21523042225051 is 15052224032512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21523042225051 - 2³ = 21523042225043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21523042224998 and 21523042225016.

It is not an unprimeable number, because it can be changed into a prime (21523042225021) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 279677721 + ... + 279754666.

It is an arithmetic number, because the mean of its divisors is an integer number (2730030053440).

Almost surely, 2^{21523042225051} is an apocalyptic number.

21523042225051 is a deficient number, since it is larger than the sum of its proper divisors (317198202469).

21523042225051 is an equidigital number, since it uses as much as digits as its factorization.

21523042225051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559432953.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 21523042225051 its reverse (15052224032512), we get a palindrome (36575266257563).

The spelling of 21523042225051 in words is "twenty-one trillion, five hundred twenty-three billion, forty-two million, two hundred twenty-five thousand, fifty-one".