21167053 has 2 divisors, whose sum is σ = 21167054. Its totient is φ = 21167052.

The previous prime is 21167021. The next prime is 21167077. The reversal of 21167053 is 35076112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20629764 + 537289 = 4542^2 + 733^2 .

It is a cyclic number.

It is not a de Polignac number, because 21167053 - 2⁵ = 21167021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21167093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10583526 + 10583527.

It is an arithmetic number, because the mean of its divisors is an integer number (10583527).

Almost surely, 2^21167053 is an apocalyptic number.

It is an amenable number.

21167053 is a deficient number, since it is larger than the sum of its proper divisors (1).

21167053 is an equidigital number, since it uses as much as digits as its factorization.

21167053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 21167053 is about 4600.7665665626. The cubic root of 21167053 is about 276.6220522889.

The spelling of 21167053 in words is "twenty-one million, one hundred sixty-seven thousand, fifty-three".