210023431 has 2 divisors, whose sum is σ = 210023432. Its totient is φ = 210023430.

The previous prime is 210023417. The next prime is 210023441. The reversal of 210023431 is 134320012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210023431 - 2⁹ = 210022919 is a prime.

It is a super-2 number, since 2×210023431² = 88219683138023522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210023441) 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, 105011715 + 105011716.

It is an arithmetic number, because the mean of its divisors is an integer number (105011716).

Almost surely, 2^210023431 is an apocalyptic number.

210023431 is a deficient number, since it is larger than the sum of its proper divisors (1).

210023431 is an equidigital number, since it uses as much as digits as its factorization.

210023431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 210023431 is about 14492.1851699459. The cubic root of 210023431 is about 594.4143011264.

Adding to 210023431 its reverse (134320012), we get a palindrome (344343443).

The spelling of 210023431 in words is "two hundred ten million, twenty-three thousand, four hundred thirty-one".