202540142321 has 16 divisors (see below), whose sum is σ = 222013759680. Its totient is φ = 183243982080.

The previous prime is 202540142303. The next prime is 202540142327. The reversal of 202540142321 is 123241045202.

It is a cyclic number.

It is not a de Polignac number, because 202540142321 - 2²⁶ = 202473033457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202540142327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6919565 + ... + 6948773.

It is an arithmetic number, because the mean of its divisors is an integer number (13875859980).

Almost surely, 2^202540142321 is an apocalyptic number.

It is an amenable number.

202540142321 is a deficient number, since it is larger than the sum of its proper divisors (19473617359).

202540142321 is a wasteful number, since it uses less digits than its factorization.

202540142321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32224.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 202540142321 its reverse (123241045202), we get a palindrome (325781187523).

The spelling of 202540142321 in words is "two hundred two billion, five hundred forty million, one hundred forty-two thousand, three hundred twenty-one".