624220145 has 4 divisors (see below), whose sum is σ = 749064180. Its totient is φ = 499376112.

The previous prime is 624220141. The next prime is 624220147. The reversal of 624220145 is 541022426.

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 495329536 + 128890609 = 22256^2 + 11353^2 .

It is a cyclic number.

It is not a de Polignac number, because 624220145 - 2² = 624220141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (624220141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62422010 + ... + 62422019.

It is an arithmetic number, because the mean of its divisors is an integer number (187266045).

Almost surely, 2^624220145 is an apocalyptic number.

It is an amenable number.

624220145 is a deficient number, since it is larger than the sum of its proper divisors (124844035).

624220145 is a wasteful number, since it uses less digits than its factorization.

624220145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124844034.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 624220145 is about 24984.3980315716. The cubic root of 624220145 is about 854.6322164521.

The spelling of 624220145 in words is "six hundred twenty-four million, two hundred twenty thousand, one hundred forty-five".