203281404685 has 8 divisors (see below), whose sum is σ = 244122354936. Its totient is φ = 162502010880.

The previous prime is 203281404671. The next prime is 203281404727. The reversal of 203281404685 is 586404182302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 106274696004 + 97006708681 = 325998^2 + 311459^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-203281404685 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15381844 + ... + 15395053.

It is an arithmetic number, because the mean of its divisors is an integer number (30515294367).

Almost surely, 2^203281404685 is an apocalyptic number.

It is an amenable number.

203281404685 is a deficient number, since it is larger than the sum of its proper divisors (40840950251).

203281404685 is a wasteful number, since it uses less digits than its factorization.

203281404685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30778223.

The product of its (nonzero) digits is 368640, while the sum is 43.

Adding to 203281404685 its reverse (586404182302), we get a palindrome (789685586987).

The spelling of 203281404685 in words is "two hundred three billion, two hundred eighty-one million, four hundred four thousand, six hundred eighty-five".