10031381 has 4 divisors (see below), whose sum is σ = 10467552. Its totient is φ = 9595212.

The previous prime is 10031369. The next prime is 10031407. The reversal of 10031381 is 18313001.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18313001 = 7 ⋅2616143.

It is a cyclic number.

It is not a de Polignac number, because 10031381 - 2⁶ = 10031317 is a prime.

It is a super-2 number, since 2×10031381² = 201257209534322, 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 (10036381) 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, 218051 + ... + 218096.

It is an arithmetic number, because the mean of its divisors is an integer number (2616888).

Almost surely, 2^10031381 is an apocalyptic number.

It is an amenable number.

10031381 is a deficient number, since it is larger than the sum of its proper divisors (436171).

10031381 is an equidigital number, since it uses as much as digits as its factorization.

10031381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436170.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 10031381 is about 3167.2355453929. The cubic root of 10031381 is about 215.6685947282.

Adding to 10031381 its reverse (18313001), we get a palindrome (28344382).

The spelling of 10031381 in words is "ten million, thirty-one thousand, three hundred eighty-one".