21341527 has 2 divisors, whose sum is σ = 21341528. Its totient is φ = 21341526.

The previous prime is 21341501. The next prime is 21341531. The reversal of 21341527 is 72514312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21341527 - 2¹⁵ = 21308759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21341557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10670763 + 10670764.

It is an arithmetic number, because the mean of its divisors is an integer number (10670764).

Almost surely, 2^21341527 is an apocalyptic number.

21341527 is a deficient number, since it is larger than the sum of its proper divisors (1).

21341527 is an equidigital number, since it uses as much as digits as its factorization.

21341527 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 25.

The square root of 21341527 is about 4619.6890588004. The cubic root of 21341527 is about 277.3800125151.

Adding to 21341527 its reverse (72514312), we get a palindrome (93855839).

The spelling of 21341527 in words is "twenty-one million, three hundred forty-one thousand, five hundred twenty-seven".