31403763381 has 8 divisors (see below), whose sum is σ = 41909650560. Its totient is φ = 20916859232.

The previous prime is 31403763379. The next prime is 31403763439. The reversal of 31403763381 is 18336730413.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31403763381 - 2¹ = 31403763379 is a prime.

It is a super-2 number, since 2×31403763381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31403763301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4741896 + ... + 4748513.

It is an arithmetic number, because the mean of its divisors is an integer number (5238706320).

Almost surely, 2^31403763381 is an apocalyptic number.

It is an amenable number.

31403763381 is a deficient number, since it is larger than the sum of its proper divisors (10505887179).

31403763381 is a wasteful number, since it uses less digits than its factorization.

31403763381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9491515.

The product of its (nonzero) digits is 108864, while the sum is 39.

The spelling of 31403763381 in words is "thirty-one billion, four hundred three million, seven hundred sixty-three thousand, three hundred eighty-one".