631541051 has 4 divisors (see below), whose sum is σ = 631879392. Its totient is φ = 631202712.

The previous prime is 631541047. The next prime is 631541069. The reversal of 631541051 is 150145136.

631541051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 631541051 - 2² = 631541047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 631541051.

It is not an unprimeable number, because it can be changed into a prime (631541011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166355 + ... + 170108.

It is an arithmetic number, because the mean of its divisors is an integer number (157969848).

Almost surely, 2^631541051 is an apocalyptic number.

631541051 is a deficient number, since it is larger than the sum of its proper divisors (338341).

631541051 is a wasteful number, since it uses less digits than its factorization.

631541051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338340.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 631541051 is about 25130.4805166953. The cubic root of 631541051 is about 857.9603054683.

Adding to 631541051 its reverse (150145136), we get a palindrome (781686187).

The spelling of 631541051 in words is "six hundred thirty-one million, five hundred forty-one thousand, fifty-one".