681531201 has 36 divisors (see below), whose sum is σ = 1081169856. Its totient is φ = 413431200.

The previous prime is 681531181. The next prime is 681531281. The reversal of 681531201 is 102135186.

681531201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 681531201 - 2⁷ = 681531073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (681531281) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 104836 + ... + 111146.

It is an arithmetic number, because the mean of its divisors is an integer number (30032496).

Almost surely, 2^681531201 is an apocalyptic number.

It is an amenable number.

681531201 is a deficient number, since it is larger than the sum of its proper divisors (399638655).

681531201 is a wasteful number, since it uses less digits than its factorization.

681531201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6414 (or 6398 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 681531201 is about 26106.1525506920. The cubic root of 681531201 is about 880.0254817862.

Adding to 681531201 its reverse (102135186), we get a palindrome (783666387).

The spelling of 681531201 in words is "six hundred eighty-one million, five hundred thirty-one thousand, two hundred one".