631806425 has 6 divisors (see below), whose sum is σ = 783439998. Its totient is φ = 505445120.

The previous prime is 631806421. The next prime is 631806437. The reversal of 631806425 is 524608136.

631806425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1394761 + 630411664 = 1181^2 + 25108^2 .

It is not a de Polignac number, because 631806425 - 2² = 631806421 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631806421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12636104 + ... + 12636153.

It is an arithmetic number, because the mean of its divisors is an integer number (130573333).

Almost surely, 2^631806425 is an apocalyptic number.

It is an amenable number.

631806425 is a deficient number, since it is larger than the sum of its proper divisors (151633573).

631806425 is a wasteful number, since it uses less digits than its factorization.

631806425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25272267 (or 25272262 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 631806425 is about 25135.7598850721. The cubic root of 631806425 is about 858.0804604842.

The spelling of 631806425 in words is "six hundred thirty-one million, eight hundred six thousand, four hundred twenty-five".