622185901 has 4 divisors (see below), whose sum is σ = 624903100. Its totient is φ = 619468704.

The previous prime is 622185899. The next prime is 622185929. The reversal of 622185901 is 109581226.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 109581226 = 2 ⋅54790613.

It can be written as a sum of positive squares in 2 ways, for example, as 385179876 + 237006025 = 19626^2 + 15395^2 .

It is a cyclic number.

It is not a de Polignac number, because 622185901 - 2¹ = 622185899 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 (622182901) 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, 1358256 + ... + 1358713.

It is an arithmetic number, because the mean of its divisors is an integer number (156225775).

Almost surely, 2^622185901 is an apocalyptic number.

It is an amenable number.

622185901 is a deficient number, since it is larger than the sum of its proper divisors (2717199).

622185901 is a wasteful number, since it uses less digits than its factorization.

622185901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2717198.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 622185901 is about 24943.6545237461. The cubic root of 622185901 is about 853.7028315016.

The spelling of 622185901 in words is "six hundred twenty-two million, one hundred eighty-five thousand, nine hundred one".