10215431 has 2 divisors, whose sum is σ = 10215432. Its totient is φ = 10215430.

The previous prime is 10215421. The next prime is 10215433. The reversal of 10215431 is 13451201.

It is a strong prime.

It is an emirp because it is prime and its reverse (13451201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10215431 - 2¹⁸ = 9953287 is a prime.

It is a super-2 number, since 2×10215431² = 208710061031522, which contains 22 as substring.

Together with 10215433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10215433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5107715 + 5107716.

It is an arithmetic number, because the mean of its divisors is an integer number (5107716).

Almost surely, 2^10215431 is an apocalyptic number.

10215431 is a deficient number, since it is larger than the sum of its proper divisors (1).

10215431 is an equidigital number, since it uses as much as digits as its factorization.

10215431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 10215431 is about 3196.1587882957. The cubic root of 10215431 is about 216.9795969972.

Adding to 10215431 its reverse (13451201), we get a palindrome (23666632).

The spelling of 10215431 in words is "ten million, two hundred fifteen thousand, four hundred thirty-one".