202140561 has 16 divisors (see below), whose sum is σ = 314578944. Its totient is φ = 113050704.

The previous prime is 202140511. The next prime is 202140581. The reversal of 202140561 is 165041202.

It is a de Polignac number, because none of the positive numbers 2^k-202140561 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (202140511) 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, 101415 + ... + 103388.

It is an arithmetic number, because the mean of its divisors is an integer number (19661184).

Almost surely, 2^202140561 is an apocalyptic number.

202140561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

202140561 is a deficient number, since it is larger than the sum of its proper divisors (112438383).

202140561 is a wasteful number, since it uses less digits than its factorization.

202140561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204860.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 202140561 is about 14217.6144623492. The cubic root of 202140561 is about 586.8824944462.

Adding to 202140561 its reverse (165041202), we get a palindrome (367181763).

The spelling of 202140561 in words is "two hundred two million, one hundred forty thousand, five hundred sixty-one".