21523303354031 has 8 divisors (see below), whose sum is σ = 22048324686864. Its totient is φ = 20998285007680.

The previous prime is 21523303353967. The next prime is 21523303354043. The reversal of 21523303354031 is 13045330332512.

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 21523303354031 - 2⁶ = 21523303353967 is a prime.

It is a super-2 number, since 2×21523303354031² (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 = 21523303353982 and 21523303354000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21523303353031) 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, 22761200 + ... + 23687946.

It is an arithmetic number, because the mean of its divisors is an integer number (2756040585858).

Almost surely, 2^{21523303354031} is an apocalyptic number.

21523303354031 is a deficient number, since it is larger than the sum of its proper divisors (525021332833).

21523303354031 is an equidigital number, since it uses as much as digits as its factorization.

21523303354031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493241.

The product of its (nonzero) digits is 97200, while the sum is 35.

Adding to 21523303354031 its reverse (13045330332512), we get a palindrome (34568633686543).

The spelling of 21523303354031 in words is "twenty-one trillion, five hundred twenty-three billion, three hundred three million, three hundred fifty-four thousand, thirty-one".