622243145 has 4 divisors (see below), whose sum is σ = 746691780. Its totient is φ = 497794512.

The previous prime is 622243121. The next prime is 622243157. The reversal of 622243145 is 541342226.

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 162741049 + 459502096 = 12757^2 + 21436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-622243145 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62224310 + ... + 62224319.

It is an arithmetic number, because the mean of its divisors is an integer number (186672945).

Almost surely, 2^622243145 is an apocalyptic number.

It is an amenable number.

622243145 is a deficient number, since it is larger than the sum of its proper divisors (124448635).

622243145 is a wasteful number, since it uses less digits than its factorization.

622243145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124448634.

The product of its digits is 11520, while the sum is 29.

The square root of 622243145 is about 24944.8019635354. The cubic root of 622243145 is about 853.7290122439.

The spelling of 622243145 in words is "six hundred twenty-two million, two hundred forty-three thousand, one hundred forty-five".