631823381 has 8 divisors (see below), whose sum is σ = 738876864. Its totient is φ = 528968160.

The previous prime is 631823329. The next prime is 631823419. The reversal of 631823381 is 183328136.

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

It is not a de Polignac number, because 631823381 - 2¹⁴ = 631806997 is a prime.

It is a super-2 number, since 2×631823381² = 798401569556542322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631823681) 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, 1049240 + ... + 1049841.

It is an arithmetic number, because the mean of its divisors is an integer number (92359608).

Almost surely, 2^631823381 is an apocalyptic number.

It is an amenable number.

631823381 is a deficient number, since it is larger than the sum of its proper divisors (107053483).

631823381 is a wasteful number, since it uses less digits than its factorization.

631823381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099131.

The product of its digits is 20736, while the sum is 35.

The square root of 631823381 is about 25136.0971711998. The cubic root of 631823381 is about 858.0881366128.

The spelling of 631823381 in words is "six hundred thirty-one million, eight hundred twenty-three thousand, three hundred eighty-one".