625820311 has 2 divisors, whose sum is σ = 625820312. Its totient is φ = 625820310.

The previous prime is 625820297. The next prime is 625820333. The reversal of 625820311 is 113028526.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 625820311 - 2¹⁵ = 625787543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 625820311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625820381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312910155 + 312910156.

It is an arithmetic number, because the mean of its divisors is an integer number (312910156).

Almost surely, 2^625820311 is an apocalyptic number.

625820311 is a deficient number, since it is larger than the sum of its proper divisors (1).

625820311 is an equidigital number, since it uses as much as digits as its factorization.

625820311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 625820311 is about 25016.4008402488. The cubic root of 625820311 is about 855.3618663625.

Adding to 625820311 its reverse (113028526), we get a palindrome (738848837).

It can be divided in two parts, 6258 and 20311, that added together give a square (26569 = 163²).

The spelling of 625820311 in words is "six hundred twenty-five million, eight hundred twenty thousand, three hundred eleven".