631313194433 has 4 divisors (see below), whose sum is σ = 631331550660. Its totient is φ = 631294838208.

The previous prime is 631313194429. The next prime is 631313194451. The reversal of 631313194433 is 334491313136.

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

It can be written as a sum of positive squares in 2 ways, for example, as 293685957184 + 337627237249 = 541928^2 + 581057^2 .

It is a cyclic number.

It is not a de Polignac number, because 631313194433 - 2² = 631313194429 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631313194483) 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, 9126428 + ... + 9195341.

It is an arithmetic number, because the mean of its divisors is an integer number (157832887665).

Almost surely, 2^631313194433 is an apocalyptic number.

It is an amenable number.

631313194433 is a deficient number, since it is larger than the sum of its proper divisors (18356227).

631313194433 is a wasteful number, since it uses less digits than its factorization.

631313194433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18356226.

The product of its digits is 209952, while the sum is 41.

The spelling of 631313194433 in words is "six hundred thirty-one billion, three hundred thirteen million, one hundred ninety-four thousand, four hundred thirty-three".