23211450145521 has 16 divisors (see below), whose sum is σ = 37513454781120. Its totient is φ = 14067545542560.

The previous prime is 23211450145519. The next prime is 23211450145589. The reversal of 23211450145521 is 12554105411232.

23211450145521 is a `hidden beast` number, since 2 + 3 + 2 + 11 + 450 + 145 + 52 + 1 = 666.

It is not a de Polignac number, because 23211450145521 - 2¹ = 23211450145519 is a prime.

It is a super-2 number, since 2×23211450145521² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23211450140521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39076515100 + ... + 39076515693.

It is an arithmetic number, because the mean of its divisors is an integer number (2344590923820).

Almost surely, 2^{23211450145521} is an apocalyptic number.

It is an amenable number.

23211450145521 is a deficient number, since it is larger than the sum of its proper divisors (14302004635599).

23211450145521 is a wasteful number, since it uses less digits than its factorization.

23211450145521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78153030813 (or 78153030807 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

Adding to 23211450145521 its reverse (12554105411232), we get a palindrome (35765555556753).

The spelling of 23211450145521 in words is "twenty-three trillion, two hundred eleven billion, four hundred fifty million, one hundred forty-five thousand, five hundred twenty-one".