631284725 has 6 divisors (see below), whose sum is σ = 782793090. Its totient is φ = 505027760.

The previous prime is 631284721. The next prime is 631284733. The reversal of 631284725 is 527482136.

It is a happy number.

631284725 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 89000356 + 542284369 = 9434^2 + 23287^2 .

It is not a de Polignac number, because 631284725 - 2² = 631284721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631284721) 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, 12625670 + ... + 12625719.

It is an arithmetic number, because the mean of its divisors is an integer number (130465515).

Almost surely, 2^631284725 is an apocalyptic number.

It is an amenable number.

631284725 is a deficient number, since it is larger than the sum of its proper divisors (151508365).

631284725 is a wasteful number, since it uses less digits than its factorization.

631284725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25251399 (or 25251394 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 631284725 is about 25125.3800966274. The cubic root of 631284725 is about 857.8442152091.

The spelling of 631284725 in words is "six hundred thirty-one million, two hundred eighty-four thousand, seven hundred twenty-five".