622430561 has 4 divisors (see below), whose sum is σ = 622594500. Its totient is φ = 622266624.

The previous prime is 622430551. The next prime is 622430573. The reversal of 622430561 is 165034226.

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

It can be written as a sum of positive squares in 2 ways, for example, as 570302161 + 52128400 = 23881^2 + 7220^2 .

It is a cyclic number.

It is not a de Polignac number, because 622430561 - 2²² = 618236257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (622430521) 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, 76136 + ... + 83913.

It is an arithmetic number, because the mean of its divisors is an integer number (155648625).

Almost surely, 2^622430561 is an apocalyptic number.

It is an amenable number.

622430561 is a deficient number, since it is larger than the sum of its proper divisors (163939).

622430561 is a wasteful number, since it uses less digits than its factorization.

622430561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163938.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 622430561 is about 24948.5582950198. The cubic root of 622430561 is about 853.8147163702.

Adding to 622430561 its reverse (165034226), we get a palindrome (787464787).

The spelling of 622430561 in words is "six hundred twenty-two million, four hundred thirty thousand, five hundred sixty-one".