625454881 has 2 divisors, whose sum is σ = 625454882. Its totient is φ = 625454880.

The previous prime is 625454857. The next prime is 625454927. The reversal of 625454881 is 188454526.

625454881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 517107600 + 108347281 = 22740^2 + 10409^2 .

It is a cyclic number.

It is not a de Polignac number, because 625454881 - 2¹¹ = 625452833 is a prime.

It is a super-2 number, since 2×625454881² = 782387616333448322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (625454681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312727440 + 312727441.

It is an arithmetic number, because the mean of its divisors is an integer number (312727441).

Almost surely, 2^625454881 is an apocalyptic number.

It is an amenable number.

625454881 is a deficient number, since it is larger than the sum of its proper divisors (1).

625454881 is an equidigital number, since it uses as much as digits as its factorization.

625454881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 307200, while the sum is 43.

The square root of 625454881 is about 25009.0959652683. The cubic root of 625454881 is about 855.1953458555.

The spelling of 625454881 in words is "six hundred twenty-five million, four hundred fifty-four thousand, eight hundred eighty-one".