631489355 has 16 divisors (see below), whose sum is σ = 895907520. Its totient is φ = 418088832.

The previous prime is 631489351. The next prime is 631489363. The reversal of 631489355 is 553984136.

631489355 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 631489355 - 2² = 631489351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631489351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310064 + ... + 312093.

It is an arithmetic number, because the mean of its divisors is an integer number (55994220).

Almost surely, 2^631489355 is an apocalyptic number.

631489355 is a deficient number, since it is larger than the sum of its proper divisors (264418165).

631489355 is a wasteful number, since it uses less digits than its factorization.

631489355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622198.

The product of its digits is 388800, while the sum is 44.

The square root of 631489355 is about 25129.4519438845. The cubic root of 631489355 is about 857.9368948359.

The spelling of 631489355 in words is "six hundred thirty-one million, four hundred eighty-nine thousand, three hundred fifty-five".