203280961 has 4 divisors (see below), whose sum is σ = 218917972. Its totient is φ = 187643952.

The previous prime is 203280949. The next prime is 203280991. The reversal of 203280961 is 169082302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 169082302 = 2 ⋅84541151.

It can be written as a sum of positive squares in 2 ways, for example, as 44142736 + 159138225 = 6644^2 + 12615^2 .

It is a cyclic number.

It is not a de Polignac number, because 203280961 - 2¹⁷ = 203149889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203280941) 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, 7818486 + ... + 7818511.

It is an arithmetic number, because the mean of its divisors is an integer number (54729493).

Almost surely, 2^203280961 is an apocalyptic number.

It is an amenable number.

203280961 is a deficient number, since it is larger than the sum of its proper divisors (15637011).

203280961 is a wasteful number, since it uses less digits than its factorization.

203280961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15637010.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 203280961 is about 14257.6632377119. The cubic root of 203280961 is about 587.9840812403.

The spelling of 203280961 in words is "two hundred three million, two hundred eighty thousand, nine hundred sixty-one".