21622151053 has 2 divisors, whose sum is σ = 21622151054. Its totient is φ = 21622151052.

The previous prime is 21622151027. The next prime is 21622151059. The reversal of 21622151053 is 35015122612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19065534084 + 2556616969 = 138078^2 + 50563^2 .

It is a cyclic number.

It is not a de Polignac number, because 21622151053 - 2⁵ = 21622151021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21622151059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10811075526 + 10811075527.

It is an arithmetic number, because the mean of its divisors is an integer number (10811075527).

Almost surely, 2^21622151053 is an apocalyptic number.

It is an amenable number.

21622151053 is a deficient number, since it is larger than the sum of its proper divisors (1).

21622151053 is an equidigital number, since it uses as much as digits as its factorization.

21622151053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 21622151053 its reverse (35015122612), we get a palindrome (56637273665).

The spelling of 21622151053 in words is "twenty-one billion, six hundred twenty-two million, one hundred fifty-one thousand, fifty-three".