204306251261 has 16 divisors (see below), whose sum is σ = 235941745536. Its totient is φ = 173283618816.

The previous prime is 204306251249. The next prime is 204306251269. The reversal of 204306251261 is 162152603402.

It is not a de Polignac number, because 204306251261 - 2³⁴ = 187126382077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204306251269) 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, 4340525 + ... + 4387341.

It is an arithmetic number, because the mean of its divisors is an integer number (14746359096).

Almost surely, 2^204306251261 is an apocalyptic number.

It is an amenable number.

204306251261 is a deficient number, since it is larger than the sum of its proper divisors (31635494275).

204306251261 is an equidigital number, since it uses as much as digits as its factorization.

204306251261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53348.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 204306251261 its reverse (162152603402), we get a palindrome (366458854663).

The spelling of 204306251261 in words is "two hundred four billion, three hundred six million, two hundred fifty-one thousand, two hundred sixty-one".