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22013401 = 181121621
BaseRepresentation
bin101001111111…
…0010111011001
31112102101201011
41103332113121
521113412101
62103453521
7355053004
oct123762731
945371634
1022013401
1111475aa3
1274572a1
1347399a7
142cd053b
151dec751
hex14fe5d9

22013401 has 4 divisors (see below), whose sum is σ = 22135204. Its totient is φ = 21891600.

The previous prime is 22013399. The next prime is 22013413. The reversal of 22013401 is 10431022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1628176 + 20385225 = 1276^2 + 4515^2 .

It is a cyclic number.

It is not a de Polignac number, because 22013401 - 21 = 22013399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22013491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60630 + ... + 60991.

It is an arithmetic number, because the mean of its divisors is an integer number (5533801).

Almost surely, 222013401 is an apocalyptic number.

It is an amenable number.

22013401 is a deficient number, since it is larger than the sum of its proper divisors (121803).

22013401 is a wasteful number, since it uses less digits than its factorization.

22013401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121802.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 22013401 is about 4691.8440937440. The cubic root of 22013401 is about 280.2608156523.

Adding to 22013401 its reverse (10431022), we get a palindrome (32444423).

The spelling of 22013401 in words is "twenty-two million, thirteen thousand, four hundred one".

Divisors: 1 181 121621 22013401