605221501 has 4 divisors (see below), whose sum is σ = 605283004. Its totient is φ = 605160000.

The previous prime is 605221499. The next prime is 605221523. The reversal of 605221501 is 105122506.

605221501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 113934276 + 491287225 = 10674^2 + 22165^2 .

It is a 3-Lehmer number, since φ(605221501) divides (605221501-1)³.

It is a cyclic number.

It is not a de Polignac number, because 605221501 - 2¹ = 605221499 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 (605221531) 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, 12300 + ... + 36901.

It is an arithmetic number, because the mean of its divisors is an integer number (151320751).

It is a Poulet number, since it divides 2^605221500-1.

Almost surely, 2^605221501 is an apocalyptic number.

605221501 is the 12301-st decagonal number.

It is an amenable number.

605221501 is a deficient number, since it is larger than the sum of its proper divisors (61503).

605221501 is a wasteful number, since it uses less digits than its factorization.

605221501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61502.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 605221501 is about 24601.2499885677. The cubic root of 605221501 is about 845.8722601275.

The spelling of 605221501 in words is "six hundred five million, two hundred twenty-one thousand, five hundred one".