625313251 has 2 divisors, whose sum is σ = 625313252. Its totient is φ = 625313250.

The previous prime is 625313233. The next prime is 625313279. The reversal of 625313251 is 152313526.

It is an a-pointer prime, because the next prime (625313279) can be obtained adding 625313251 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 625313251 - 2¹⁵ = 625280483 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (625313231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312656625 + 312656626.

It is an arithmetic number, because the mean of its divisors is an integer number (312656626).

Almost surely, 2^625313251 is an apocalyptic number.

625313251 is a deficient number, since it is larger than the sum of its proper divisors (1).

625313251 is an equidigital number, since it uses as much as digits as its factorization.

625313251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 28.

The square root of 625313251 is about 25006.2642351872. The cubic root of 625313251 is about 855.1307899278.

Adding to 625313251 its reverse (152313526), we get a palindrome (777626777).

The spelling of 625313251 in words is "six hundred twenty-five million, three hundred thirteen thousand, two hundred fifty-one".