625222217 has 4 divisors (see below), whose sum is σ = 625828500. Its totient is φ = 624615936.

The previous prime is 625222207. The next prime is 625222231. The reversal of 625222217 is 712222526.

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 604963216 + 20259001 = 24596^2 + 4501^2 .

It is a cyclic number.

It is not a de Polignac number, because 625222217 - 2²⁴ = 608445001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 625222217.

It is not an unprimeable number, because it can be changed into a prime (625222207) 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, 301592 + ... + 303657.

It is an arithmetic number, because the mean of its divisors is an integer number (156457125).

Almost surely, 2^625222217 is an apocalyptic number.

It is an amenable number.

625222217 is a deficient number, since it is larger than the sum of its proper divisors (606283).

625222217 is a wasteful number, since it uses less digits than its factorization.

625222217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606282.

The product of its digits is 6720, while the sum is 29.

The square root of 625222217 is about 25004.4439450271. The cubic root of 625222217 is about 855.0892908582.

The spelling of 625222217 in words is "six hundred twenty-five million, two hundred twenty-two thousand, two hundred seventeen".