201056223565 has 32 divisors (see below), whose sum is σ = 247344918912. Its totient is φ = 156844512000.

The previous prime is 201056223553. The next prime is 201056223607. The reversal of 201056223565 is 565322650102.

It is not a de Polignac number, because 201056223565 - 2¹¹ = 201056221517 is a prime.

It is a super-2 number, since 2×201056223565² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18267354 + ... + 18278356.

It is an arithmetic number, because the mean of its divisors is an integer number (7729528716).

Almost surely, 2^201056223565 is an apocalyptic number.

It is an amenable number.

201056223565 is a deficient number, since it is larger than the sum of its proper divisors (46288695347).

201056223565 is a wasteful number, since it uses less digits than its factorization.

201056223565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11581.

The product of its (nonzero) digits is 108000, while the sum is 37.

Adding to 201056223565 its reverse (565322650102), we get a palindrome (766378873667).

The spelling of 201056223565 in words is "two hundred one billion, fifty-six million, two hundred twenty-three thousand, five hundred sixty-five".