21714555 has 16 divisors (see below), whose sum is σ = 34977024. Its totient is φ = 11503200.

The previous prime is 21714547. The next prime is 21714571. The reversal of 21714555 is 55541712.

It is not a de Polignac number, because 21714555 - 2³ = 21714547 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2529 + ... + 7058.

It is an arithmetic number, because the mean of its divisors is an integer number (2186064).

Almost surely, 2^21714555 is an apocalyptic number.

21714555 is a deficient number, since it is larger than the sum of its proper divisors (13262469).

21714555 is a wasteful number, since it uses less digits than its factorization.

21714555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9746.

The product of its digits is 7000, while the sum is 30.

The square root of 21714555 is about 4659.8878741875. The cubic root of 21714555 is about 278.9867929669.

The spelling of 21714555 in words is "twenty-one million, seven hundred fourteen thousand, five hundred fifty-five".