21951041 has 8 divisors (see below), whose sum is σ = 25309824. Its totient is φ = 18648000.

The previous prime is 21950987. The next prime is 21951043. The reversal of 21951041 is 14015912.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21951041 - 2⁶ = 21950977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21950998 and 21951016.

It is not an unprimeable number, because it can be changed into a prime (21951043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13085 + ... + 14666.

It is an arithmetic number, because the mean of its divisors is an integer number (3163728).

Almost surely, 2^21951041 is an apocalyptic number.

It is an amenable number.

21951041 is a deficient number, since it is larger than the sum of its proper divisors (3358783).

21951041 is a wasteful number, since it uses less digits than its factorization.

21951041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27871.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 21951041 is about 4685.1938060234. The cubic root of 21951041 is about 279.9959225597.

Adding to 21951041 its reverse (14015912), we get a palindrome (35966953).

The spelling of 21951041 in words is "twenty-one million, nine hundred fifty-one thousand, forty-one".