21522044031 has 16 divisors (see below), whose sum is σ = 28929251424. Its totient is φ = 14231752704.

The previous prime is 21522044029. The next prime is 21522044039. The reversal of 21522044031 is 13044022512.

It is not a de Polignac number, because 21522044031 - 2¹ = 21522044029 is a prime.

It is a super-2 number, since 2×21522044031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21522043992 and 21522044010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21522044039) 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, 232171 + ... + 311363.

It is an arithmetic number, because the mean of its divisors is an integer number (1808078214).

Almost surely, 2^21522044031 is an apocalyptic number.

21522044031 is a deficient number, since it is larger than the sum of its proper divisors (7407207393).

21522044031 is a wasteful number, since it uses less digits than its factorization.

21522044031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79930.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 21522044031 its reverse (13044022512), we get a palindrome (34566066543).

The spelling of 21522044031 in words is "twenty-one billion, five hundred twenty-two million, forty-four thousand, thirty-one".