21514801 has 8 divisors (see below), whose sum is σ = 26823744. Its totient is φ = 16764720.

The previous prime is 21514789. The next prime is 21514807. The reversal of 21514801 is 10841512.

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

It is not a de Polignac number, because 21514801 - 2⁵ = 21514769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21514807) 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, 139630 + ... + 139783.

It is an arithmetic number, because the mean of its divisors is an integer number (3352968).

Almost surely, 2^21514801 is an apocalyptic number.

It is an amenable number.

21514801 is a deficient number, since it is larger than the sum of its proper divisors (5308943).

21514801 is a wasteful number, since it uses less digits than its factorization.

21514801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279431.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 21514801 is about 4638.4050060339. The cubic root of 21514801 is about 278.1286820368.

Subtracting from 21514801 its reverse (10841512), we obtain a square (10673289 = 3267²).

The spelling of 21514801 in words is "twenty-one million, five hundred fourteen thousand, eight hundred one".