781233201 has 64 divisors (see below), whose sum is σ = 1394933760. Its totient is φ = 422677440.

The previous prime is 781233191. The next prime is 781233209. The reversal of 781233201 is 102332187.

It is not a de Polignac number, because 781233201 - 2⁵ = 781233169 is a prime.

It is a super-2 number, since 2×781233201² = 1220650628689412802, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (781233209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 273955 + ... + 276791.

It is an arithmetic number, because the mean of its divisors is an integer number (21795840).

Almost surely, 2^781233201 is an apocalyptic number.

It is an amenable number.

781233201 is a deficient number, since it is larger than the sum of its proper divisors (613700559).

781233201 is a wasteful number, since it uses less digits than its factorization.

781233201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931 (or 2925 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 781233201 is about 27950.5492074843. The cubic root of 781233201 is about 921.0012732213.

Adding to 781233201 its reverse (102332187), we get a palindrome (883565388).

The spelling of 781233201 in words is "seven hundred eighty-one million, two hundred thirty-three thousand, two hundred one".