21522045151 has 8 divisors (see below), whose sum is σ = 22385899008. Its totient is φ = 20668791000.

The previous prime is 21522045137. The next prime is 21522045157. The reversal of 21522045151 is 15154022512.

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 21522045151 - 2⁹ = 21522044639 is a prime.

It is a super-2 number, since 2×21522045151² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21522045157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2645785 + ... + 2653906.

It is an arithmetic number, because the mean of its divisors is an integer number (2798237376).

Almost surely, 2^21522045151 is an apocalyptic number.

21522045151 is a deficient number, since it is larger than the sum of its proper divisors (863853857).

21522045151 is a wasteful number, since it uses less digits than its factorization.

21522045151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5299853.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 21522045151 its reverse (15154022512), we get a palindrome (36676067663).

The spelling of 21522045151 in words is "twenty-one billion, five hundred twenty-two million, forty-five thousand, one hundred fifty-one".