21522152031 has 8 divisors (see below), whose sum is σ = 30384214704. Its totient is φ = 13504095360.

The previous prime is 21522152023. The next prime is 21522152033. The reversal of 21522152031 is 13025122512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21522152031 - 2³ = 21522152023 is a prime.

It is a super-2 number, since 2×21522152031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21522151992 and 21522152010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21522152033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211001440 + ... + 211001541.

It is an arithmetic number, because the mean of its divisors is an integer number (3798026838).

Almost surely, 2^21522152031 is an apocalyptic number.

21522152031 is a deficient number, since it is larger than the sum of its proper divisors (8862062673).

21522152031 is a wasteful number, since it uses less digits than its factorization.

21522152031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422003001.

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

Adding to 21522152031 its reverse (13025122512), we get a palindrome (34547274543).

The spelling of 21522152031 in words is "twenty-one billion, five hundred twenty-two million, one hundred fifty-two thousand, thirty-one".