21453031042231 has 8 divisors (see below), whose sum is σ = 22390422743520. Its totient is φ = 20516026942752.

The previous prime is 21453031042217. The next prime is 21453031042249. The reversal of 21453031042231 is 13224013035412.

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

It is not a de Polignac number, because 21453031042231 - 2⁹ = 21453031041719 is a prime.

It is a super-2 number, since 2×21453031042231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21453031042193 and 21453031042202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21453031049231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96787336 + ... + 97008733.

It is an arithmetic number, because the mean of its divisors is an integer number (2798802842940).

Almost surely, 2^{21453031042231} is an apocalyptic number.

21453031042231 is a deficient number, since it is larger than the sum of its proper divisors (937391701289).

21453031042231 is a wasteful number, since it uses less digits than its factorization.

21453031042231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193800905.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 21453031042231 its reverse (13224013035412), we get a palindrome (34677044077643).

The spelling of 21453031042231 in words is "twenty-one trillion, four hundred fifty-three billion, thirty-one million, forty-two thousand, two hundred thirty-one".