631401243 has 32 divisors (see below), whose sum is σ = 955763712. Its totient is φ = 367411200.

The previous prime is 631401203. The next prime is 631401257. The reversal of 631401243 is 342104136.

631401243 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 631401243 - 2²² = 627206939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631401203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78363 + ... + 86043.

It is an arithmetic number, because the mean of its divisors is an integer number (29867616).

Almost surely, 2^631401243 is an apocalyptic number.

631401243 is a deficient number, since it is larger than the sum of its proper divisors (324362469).

631401243 is a wasteful number, since it uses less digits than its factorization.

631401243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7795.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 631401243 is about 25127.6987207345. The cubic root of 631401243 is about 857.8969902034.

Adding to 631401243 its reverse (342104136), we get a palindrome (973505379).

The spelling of 631401243 in words is "six hundred thirty-one million, four hundred one thousand, two hundred forty-three".