581812103 has 4 divisors (see below), whose sum is σ = 583263408. Its totient is φ = 580360800.

The previous prime is 581812069. The next prime is 581812139. The reversal of 581812103 is 301218185.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 581812103 - 2⁸ = 581811847 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581812193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 725051 + ... + 725852.

It is an arithmetic number, because the mean of its divisors is an integer number (145815852).

Almost surely, 2^581812103 is an apocalyptic number.

581812103 is a deficient number, since it is larger than the sum of its proper divisors (1451305).

581812103 is a wasteful number, since it uses less digits than its factorization.

581812103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451304.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 581812103 is about 24120.7815586477. The cubic root of 581812103 is about 834.8227015485.

The spelling of 581812103 in words is "five hundred eighty-one million, eight hundred twelve thousand, one hundred three".