631434031 has 4 divisors (see below), whose sum is σ = 632101752. Its totient is φ = 630766312.

The previous prime is 631434007. The next prime is 631434073. The reversal of 631434031 is 130434136.

It is a happy number.

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 631434031 - 2¹⁹ = 630909743 is a prime.

It is a super-2 number, since 2×631434031² = 797417871009817922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 631433987 and 631434005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631437031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332440 + ... + 334333.

It is an arithmetic number, because the mean of its divisors is an integer number (158025438).

Almost surely, 2^631434031 is an apocalyptic number.

631434031 is a deficient number, since it is larger than the sum of its proper divisors (667721).

631434031 is an equidigital number, since it uses as much as digits as its factorization.

631434031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667720.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 631434031 is about 25128.3511396988. The cubic root of 631434031 is about 857.9118398414.

Adding to 631434031 its reverse (130434136), we get a palindrome (761868167).

The spelling of 631434031 in words is "six hundred thirty-one million, four hundred thirty-four thousand, thirty-one".