631043421 has 8 divisors (see below), whose sum is σ = 841731264. Its totient is φ = 420525600.

The previous prime is 631043407. The next prime is 631043431. The reversal of 631043421 is 124340136.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 631043421 - 2⁷ = 631043293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 631043391 and 631043400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631043431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33576 + ... + 48881.

It is an arithmetic number, because the mean of its divisors is an integer number (105216408).

Almost surely, 2^631043421 is an apocalyptic number.

It is an amenable number.

631043421 is a deficient number, since it is larger than the sum of its proper divisors (210687843).

631043421 is a wasteful number, since it uses less digits than its factorization.

631043421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85011.

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

The square root of 631043421 is about 25120.5776406515. The cubic root of 631043421 is about 857.7348997065.

Adding to 631043421 its reverse (124340136), we get a palindrome (755383557).

The spelling of 631043421 in words is "six hundred thirty-one million, forty-three thousand, four hundred twenty-one".