21650152161 has 32 divisors (see below), whose sum is σ = 32491653120. Its totient is φ = 12710692800.

The previous prime is 21650152127. The next prime is 21650152169. The reversal of 21650152161 is 16125105612.

It is not a de Polignac number, because 21650152161 - 2¹¹ = 21650150113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21650152169) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59826 + ... + 216516.

It is an arithmetic number, because the mean of its divisors is an integer number (1015364160).

Almost surely, 2^21650152161 is an apocalyptic number.

It is an amenable number.

21650152161 is a deficient number, since it is larger than the sum of its proper divisors (10841500959).

21650152161 is a wasteful number, since it uses less digits than its factorization.

21650152161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156837.

The product of its (nonzero) digits is 3600, while the sum is 30.

Adding to 21650152161 its reverse (16125105612), we get a palindrome (37775257773).

The spelling of 21650152161 in words is "twenty-one billion, six hundred fifty million, one hundred fifty-two thousand, one hundred sixty-one".