10021431 has 16 divisors (see below), whose sum is σ = 15584000. Its totient is φ = 5725944.

The previous prime is 10021423. The next prime is 10021439. The reversal of 10021431 is 13412001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (10021423) and next prime (10021439).

It is not a de Polignac number, because 10021431 - 2³ = 10021423 is a prime.

It is a super-2 number, since 2×10021431² = 200858158575522, 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 (10021439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3841 + ... + 5898.

It is an arithmetic number, because the mean of its divisors is an integer number (974000).

Almost surely, 2^10021431 is an apocalyptic number.

10021431 is a deficient number, since it is larger than the sum of its proper divisors (5562569).

10021431 is an frugal number, since it uses more digits than its factorization.

10021431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9763 (or 9749 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 10021431 is about 3165.6643852436. The cubic root of 10021431 is about 215.5972648217.

Adding to 10021431 its reverse (13412001), we get a palindrome (23433432).

The spelling of 10021431 in words is "ten million, twenty-one thousand, four hundred thirty-one".