10000427731 has 4 divisors (see below), whose sum is σ = 11429060272. Its totient is φ = 8571795192.

The previous prime is 10000427729. The next prime is 10000427737. The reversal of 10000427731 is 13772400001.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 10000427731 - 2¹ = 10000427729 is a prime.

It is a super-2 number, since 2×10000427731² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10000427696 and 10000427705.

It is not an unprimeable number, because it can be changed into a prime (10000427737) 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, 714316260 + ... + 714316273.

It is an arithmetic number, because the mean of its divisors is an integer number (2857265068).

Almost surely, 2^10000427731 is an apocalyptic number.

10000427731 is a deficient number, since it is larger than the sum of its proper divisors (1428632541).

10000427731 is an equidigital number, since it uses as much as digits as its factorization.

10000427731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428632540.

The product of its (nonzero) digits is 1176, while the sum is 25.

Adding to 10000427731 its reverse (13772400001), we get a palindrome (23772827732).

The spelling of 10000427731 in words is "ten billion, four hundred twenty-seven thousand, seven hundred thirty-one".