22152021231 has 8 divisors (see below), whose sum is σ = 29604559104. Its totient is φ = 14733748760.

The previous prime is 22152021223. The next prime is 22152021251. The reversal of 22152021231 is 13212025122.

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 22152021231 - 2³ = 22152021223 is a prime.

It is a super-2 number, since 2×22152021231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22152021198 and 22152021207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22152021251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8564841 + ... + 8567426.

It is an arithmetic number, because the mean of its divisors is an integer number (3700569888).

Almost surely, 2^22152021231 is an apocalyptic number.

22152021231 is a deficient number, since it is larger than the sum of its proper divisors (7452537873).

22152021231 is a wasteful number, since it uses less digits than its factorization.

22152021231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17132701.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 22152021231 its reverse (13212025122), we get a palindrome (35364046353).

The spelling of 22152021231 in words is "twenty-two billion, one hundred fifty-two million, twenty-one thousand, two hundred thirty-one".