21522125031 has 32 divisors (see below), whose sum is σ = 31576573440. Its totient is φ = 12930960000.

The previous prime is 21522125029. The next prime is 21522125057. The reversal of 21522125031 is 13052122512.

It is not a de Polignac number, because 21522125031 - 2¹ = 21522125029 is a prime.

It is a super-2 number, since 2×21522125031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21522124992 and 21522125010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21522125071) 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, 2044281 + ... + 2054781.

It is an arithmetic number, because the mean of its divisors is an integer number (986767920).

Almost surely, 2^21522125031 is an apocalyptic number.

21522125031 is a deficient number, since it is larger than the sum of its proper divisors (10054448409).

21522125031 is a wasteful number, since it uses less digits than its factorization.

21522125031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11047.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 21522125031 its reverse (13052122512), we get a palindrome (34574247543).

The spelling of 21522125031 in words is "twenty-one billion, five hundred twenty-two million, one hundred twenty-five thousand, thirty-one".