202540122005 has 8 divisors (see below), whose sum is σ = 261744157752. Its totient is φ = 149568090048.

The previous prime is 202540121989. The next prime is 202540122023. The reversal of 202540122005 is 500221045202.

It can be written as a sum of positive squares in 4 ways, for example, as 1354681636 + 201185440369 = 36806^2 + 448537^2 .

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

It is not a de Polignac number, because 202540122005 - 2⁴ = 202540121989 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 1558000874 + ... + 1558001003.

It is an arithmetic number, because the mean of its divisors is an integer number (32718019719).

Almost surely, 2^202540122005 is an apocalyptic number.

It is an amenable number.

202540122005 is a deficient number, since it is larger than the sum of its proper divisors (59204035747).

202540122005 is a wasteful number, since it uses less digits than its factorization.

202540122005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116001895.

The product of its (nonzero) digits is 1600, while the sum is 23.

Adding to 202540122005 its reverse (500221045202), we get a palindrome (702761167207).

The spelling of 202540122005 in words is "two hundred two billion, five hundred forty million, one hundred twenty-two thousand, five".