21232500361 has 4 divisors (see below), whose sum is σ = 22350000400. Its totient is φ = 20115000324.

The previous prime is 21232500313. The next prime is 21232500389. The reversal of 21232500361 is 16300523212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21232500361 - 2¹⁷ = 21232369289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21232503361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 558749991 + ... + 558750028.

It is an arithmetic number, because the mean of its divisors is an integer number (5587500100).

Almost surely, 2^21232500361 is an apocalyptic number.

It is an amenable number.

21232500361 is a deficient number, since it is larger than the sum of its proper divisors (1117500039).

21232500361 is a wasteful number, since it uses less digits than its factorization.

21232500361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117500038.

The product of its (nonzero) digits is 2160, while the sum is 25.

The spelling of 21232500361 in words is "twenty-one billion, two hundred thirty-two million, five hundred thousand, three hundred sixty-one".