261031802 has 8 divisors (see below), whose sum is σ = 391626036. Its totient is φ = 130489792.

The previous prime is 261031769. The next prime is 261031817. The reversal of 261031802 is 208130162.

261031802 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 258212761 + 2819041 = 16069^2 + 1679^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3788 + ... + 23160.

Almost surely, 2^261031802 is an apocalyptic number.

261031802 is a deficient number, since it is larger than the sum of its proper divisors (130594234).

261031802 is a wasteful number, since it uses less digits than its factorization.

261031802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26112.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 261031802 is about 16156.4786386143. The cubic root of 261031802 is about 639.0936078899.

Adding to 261031802 its reverse (208130162), we get a palindrome (469161964).

The spelling of 261031802 in words is "two hundred sixty-one million, thirty-one thousand, eight hundred two".