21341541 has 32 divisors (see below), whose sum is σ = 32739840. Its totient is φ = 12256704.

The previous prime is 21341533. The next prime is 21341543. The reversal of 21341541 is 14514312.

It is not a de Polignac number, because 21341541 - 2³ = 21341533 is a prime.

It is a super-2 number, since 2×21341541² = 910922744509362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21341543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61330 + ... + 61676.

It is an arithmetic number, because the mean of its divisors is an integer number (1023120).

Almost surely, 2^21341541 is an apocalyptic number.

It is an amenable number.

21341541 is a deficient number, since it is larger than the sum of its proper divisors (11398299).

21341541 is a wasteful number, since it uses less digits than its factorization.

21341541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465.

The product of its digits is 480, while the sum is 21.

The square root of 21341541 is about 4619.6905740536. The cubic root of 21341541 is about 277.3800731687.

Adding to 21341541 its reverse (14514312), we get a palindrome (35855853).

The spelling of 21341541 in words is "twenty-one million, three hundred forty-one thousand, five hundred forty-one".