581450855 has 4 divisors (see below), whose sum is σ = 697741032. Its totient is φ = 465160680.

The previous prime is 581450851. The next prime is 581450873. The reversal of 581450855 is 558054185.

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

It is not a de Polignac number, because 581450855 - 2² = 581450851 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581450851) 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, 58145081 + ... + 58145090.

It is an arithmetic number, because the mean of its divisors is an integer number (174435258).

Almost surely, 2^581450855 is an apocalyptic number.

581450855 is a deficient number, since it is larger than the sum of its proper divisors (116290177).

581450855 is a wasteful number, since it uses less digits than its factorization.

581450855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116290176.

The product of its (nonzero) digits is 160000, while the sum is 41.

The square root of 581450855 is about 24113.2920813397. The cubic root of 581450855 is about 834.6498848906.

The spelling of 581450855 in words is "five hundred eighty-one million, four hundred fifty thousand, eight hundred fifty-five".