21514141 has 4 divisors (see below), whose sum is σ = 23469984. Its totient is φ = 19558300.

The previous prime is 21514123. The next prime is 21514153. The reversal of 21514141 is 14141512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21514141 - 2⁷ = 21514013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21514841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 977905 + ... + 977926.

It is an arithmetic number, because the mean of its divisors is an integer number (5867496).

Almost surely, 2^21514141 is an apocalyptic number.

It is an amenable number.

21514141 is a deficient number, since it is larger than the sum of its proper divisors (1955843).

21514141 is a wasteful number, since it uses less digits than its factorization.

21514141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955842.

The product of its digits is 160, while the sum is 19.

The square root of 21514141 is about 4638.3338603425. Note that the first 3 decimals coincide. The cubic root of 21514141 is about 278.1258379977.

Adding to 21514141 its reverse (14141512), we get a palindrome (35655653).

The spelling of 21514141 in words is "twenty-one million, five hundred fourteen thousand, one hundred forty-one".