213187453 has 2 divisors, whose sum is σ = 213187454. Its totient is φ = 213187452.

The previous prime is 213187433. The next prime is 213187477. The reversal of 213187453 is 354781312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213101604 + 85849 = 14598^2 + 293^2 .

It is a cyclic number.

It is not a de Polignac number, because 213187453 - 2¹⁷ = 213056381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213187433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106593726 + 106593727.

It is an arithmetic number, because the mean of its divisors is an integer number (106593727).

Almost surely, 2^213187453 is an apocalyptic number.

It is an amenable number.

213187453 is a deficient number, since it is larger than the sum of its proper divisors (1).

213187453 is an equidigital number, since it uses as much as digits as its factorization.

213187453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 213187453 is about 14600.9401409635. The cubic root of 213187453 is about 597.3844041474.

The spelling of 213187453 in words is "two hundred thirteen million, one hundred eighty-seven thousand, four hundred fifty-three".