31350407381 has 4 divisors (see below), whose sum is σ = 31379900832. Its totient is φ = 31320913932.

The previous prime is 31350407371. The next prime is 31350407411. The reversal of 31350407381 is 18370405313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31350407381 - 2¹⁴ = 31350390997 is a prime.

It is a super-2 number, since 2×31350407381² (a number of 22 digits) 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 (31350407371) 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, 14745131 + ... + 14747256.

It is an arithmetic number, because the mean of its divisors is an integer number (7844975208).

Almost surely, 2^31350407381 is an apocalyptic number.

It is an amenable number.

31350407381 is a deficient number, since it is larger than the sum of its proper divisors (29493451).

31350407381 is a wasteful number, since it uses less digits than its factorization.

31350407381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29493450.

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 31350407381 in words is "thirty-one billion, three hundred fifty million, four hundred seven thousand, three hundred eighty-one".