204020131 has 4 divisors (see below), whose sum is σ = 233165872. Its totient is φ = 174874392.

The previous prime is 204019979. The next prime is 204020153. The reversal of 204020131 is 131020402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131020402 = 2 ⋅65510201.

It is not a de Polignac number, because 204020131 - 2¹⁹ = 203495843 is a prime.

It is a super-2 number, since 2×204020131² = 83248427706514322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204026131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14572860 + ... + 14572873.

It is an arithmetic number, because the mean of its divisors is an integer number (58291468).

Almost surely, 2^204020131 is an apocalyptic number.

204020131 is a deficient number, since it is larger than the sum of its proper divisors (29145741).

204020131 is an equidigital number, since it uses as much as digits as its factorization.

204020131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29145740.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 204020131 is about 14283.5615656600. The cubic root of 204020131 is about 588.6958948541.

Adding to 204020131 its reverse (131020402), we get a palindrome (335040533).

The spelling of 204020131 in words is "two hundred four million, twenty thousand, one hundred thirty-one".