625516217 has 4 divisors (see below), whose sum is σ = 625883940. Its totient is φ = 625148496.

The previous prime is 625516193. The next prime is 625516259. The reversal of 625516217 is 712615526.

625516217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 351150121 + 274366096 = 18739^2 + 16564^2 .

It is a cyclic number.

It is not a de Polignac number, because 625516217 - 2⁶ = 625516153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625516267) 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, 181298 + ... + 184715.

It is an arithmetic number, because the mean of its divisors is an integer number (156470985).

Almost surely, 2^625516217 is an apocalyptic number.

It is an amenable number.

625516217 is a deficient number, since it is larger than the sum of its proper divisors (367723).

625516217 is a wasteful number, since it uses less digits than its factorization.

625516217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367722.

The product of its digits is 25200, while the sum is 35.

The square root of 625516217 is about 25010.3222090400. The cubic root of 625516217 is about 855.2233002019.

The spelling of 625516217 in words is "six hundred twenty-five million, five hundred sixteen thousand, two hundred seventeen".