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201022 = 2100511

201022 has 4 divisors (see below), whose sum is σ = 301536. Its totient is φ = 100510.

The previous prime is 201011. The next prime is 201031. The reversal of 201022 is 220102.

It is a happy number.

201022 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 220102 = 2110051.

It is a plaindrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 200996 and 201014.

It is a congruent number.

It is an unprimeable number.

201022 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50254 + ... + 50257.

It is an arithmetic number, because the mean of its divisors is an integer number (75384).

2201022 is an apocalyptic number.

201022 is a deficient number, since it is larger than the sum of its proper divisors (100514).

201022 is a wasteful number, since it uses less digits than its factorization.

201022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100513.

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 201022 is about 448.3547702434. The cubic root of 201022 is about 58.5797971103.

Adding to 201022 its reverse (220102), we get a palindrome (421124).

It can be divided in two parts, 20102 and 2, that multiplied together give a palindrome (40204).

The spelling of 201022 in words is "two hundred one thousand, twenty-two", and thus it is an iban number.

Divisors: 1 2 100511 201022