21032153 has 2 divisors, whose sum is σ = 21032154. Its totient is φ = 21032152.

The previous prime is 21032119. The next prime is 21032159. The reversal of 21032153 is 35123012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20313049 + 719104 = 4507^2 + 848^2 .

It is a cyclic number.

It is not a de Polignac number, because 21032153 - 2¹⁴ = 21015769 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21032159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516076 + 10516077.

It is an arithmetic number, because the mean of its divisors is an integer number (10516077).

Almost surely, 2^21032153 is an apocalyptic number.

It is an amenable number.

21032153 is a deficient number, since it is larger than the sum of its proper divisors (1).

21032153 is an equidigital number, since it uses as much as digits as its factorization.

21032153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 21032153 is about 4586.0825330559. The cubic root of 21032153 is about 276.0331516924.

Adding to 21032153 its reverse (35123012), we get a palindrome (56155165).

The spelling of 21032153 in words is "twenty-one million, thirty-two thousand, one hundred fifty-three".