21714553 has 8 divisors (see below), whose sum is σ = 25895808. Its totient is φ = 17803104.

The previous prime is 21714547. The next prime is 21714571. The reversal of 21714553 is 35541712.

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 21714553 - 2⁵ = 21714521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21714503) 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, 67276 + ... + 67597.

It is an arithmetic number, because the mean of its divisors is an integer number (3236976).

Almost surely, 2^21714553 is an apocalyptic number.

21714553 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21714553 is a deficient number, since it is larger than the sum of its proper divisors (4181255).

21714553 is a wasteful number, since it uses less digits than its factorization.

21714553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134903.

The product of its digits is 4200, while the sum is 28.

The square root of 21714553 is about 4659.8876595901. The cubic root of 21714553 is about 278.9867844016.

It can be divided in two parts, 2171 and 4553, that added together give a square (6724 = 82²).

The spelling of 21714553 in words is "twenty-one million, seven hundred fourteen thousand, five hundred fifty-three".