21522461151 has 4 divisors (see below), whose sum is σ = 28696614872. Its totient is φ = 14348307432.

The previous prime is 21522461137. The next prime is 21522461153. The reversal of 21522461151 is 15116422512.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21522461151 - 2⁵ = 21522461119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21522461153) 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 3 ways as a sum of consecutive naturals, for example, 3587076856 + ... + 3587076861.

It is an arithmetic number, because the mean of its divisors is an integer number (7174153718).

Almost surely, 2^21522461151 is an apocalyptic number.

21522461151 is a deficient number, since it is larger than the sum of its proper divisors (7174153721).

21522461151 is an equidigital number, since it uses as much as digits as its factorization.

21522461151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7174153720.

The product of its digits is 4800, while the sum is 30.

Adding to 21522461151 its reverse (15116422512), we get a palindrome (36638883663).

The spelling of 21522461151 in words is "twenty-one billion, five hundred twenty-two million, four hundred sixty-one thousand, one hundred fifty-one".