681558203 has 16 divisors (see below), whose sum is σ = 748440000. Its totient is φ = 617766912.

The previous prime is 681558197. The next prime is 681558209. The reversal of 681558203 is 302855186.

It is an interprime number because it is at equal distance from previous prime (681558197) and next prime (681558209).

It is a cyclic number.

It is not a de Polignac number, because 681558203 - 2¹⁰ = 681557179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681558209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219818 + ... + 222896.

It is an arithmetic number, because the mean of its divisors is an integer number (46777500).

Almost surely, 2^681558203 is an apocalyptic number.

681558203 is a deficient number, since it is larger than the sum of its proper divisors (66881797).

681558203 is a wasteful number, since it uses less digits than its factorization.

681558203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3574.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 681558203 is about 26106.6697033536. The cubic root of 681558203 is about 880.0371037214.

The spelling of 681558203 in words is "six hundred eighty-one million, five hundred fifty-eight thousand, two hundred three".