22013555 has 8 divisors (see below), whose sum is σ = 27970272. Its totient is φ = 16574848.

The previous prime is 22013539. The next prime is 22013561. The reversal of 22013555 is 55531022.

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

It is a cyclic number.

It is not a de Polignac number, because 22013555 - 2⁴ = 22013539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22013555.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129407 + ... + 129576.

It is an arithmetic number, because the mean of its divisors is an integer number (3496284).

Almost surely, 2^22013555 is an apocalyptic number.

22013555 is a deficient number, since it is larger than the sum of its proper divisors (5956717).

22013555 is a wasteful number, since it uses less digits than its factorization.

22013555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259005.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 22013555 is about 4691.8605051728. The cubic root of 22013555 is about 280.2614691946.

Adding to 22013555 its reverse (55531022), we get a palindrome (77544577).

The spelling of 22013555 in words is "twenty-two million, thirteen thousand, five hundred fifty-five".