201522235545 has 24 divisors (see below), whose sum is σ = 361350217800. Its totient is φ = 103772368896.

The previous prime is 201522235517. The next prime is 201522235561. The reversal of 201522235545 is 545532225102.

201522235545 is a `hidden beast` number, since 20 + 1 + 522 + 23 + 55 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 20227666176 + 181294569369 = 142224^2 + 425787^2 .

It is not a de Polignac number, because 201522235545 - 2⁵ = 201522235513 is a prime.

It is a super-2 number, since 2×201522235545² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77210280 + ... + 77212889.

It is an arithmetic number, because the mean of its divisors is an integer number (15056259075).

Almost surely, 2^201522235545 is an apocalyptic number.

It is an amenable number.

201522235545 is a deficient number, since it is larger than the sum of its proper divisors (159827982255).

201522235545 is a wasteful number, since it uses less digits than its factorization.

201522235545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154423209 (or 154423206 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

The spelling of 201522235545 in words is "two hundred one billion, five hundred twenty-two million, two hundred thirty-five thousand, five hundred forty-five".