210423253 has 2 divisors, whose sum is σ = 210423254. Its totient is φ = 210423252.

The previous prime is 210423247. The next prime is 210423281. The reversal of 210423253 is 352324012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194407249 + 16016004 = 13943^2 + 4002^2 .

It is a cyclic number.

It is not a de Polignac number, because 210423253 - 2¹³ = 210415061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210423203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105211626 + 105211627.

It is an arithmetic number, because the mean of its divisors is an integer number (105211627).

Almost surely, 2^210423253 is an apocalyptic number.

It is an amenable number.

210423253 is a deficient number, since it is larger than the sum of its proper divisors (1).

210423253 is an equidigital number, since it uses as much as digits as its factorization.

210423253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 210423253 is about 14505.9730111427. The cubic root of 210423253 is about 594.7912578969.

Adding to 210423253 its reverse (352324012), we get a palindrome (562747265).

The spelling of 210423253 in words is "two hundred ten million, four hundred twenty-three thousand, two hundred fifty-three".