213706253 has 2 divisors, whose sum is σ = 213706254. Its totient is φ = 213706252.

The previous prime is 213706217. The next prime is 213706267. The reversal of 213706253 is 352607312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170119849 + 43586404 = 13043^2 + 6602^2 .

It is a cyclic number.

It is not a de Polignac number, because 213706253 - 2⁶ = 213706189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213706153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106853126 + 106853127.

It is an arithmetic number, because the mean of its divisors is an integer number (106853127).

Almost surely, 2^213706253 is an apocalyptic number.

It is an amenable number.

213706253 is a deficient number, since it is larger than the sum of its proper divisors (1).

213706253 is an equidigital number, since it uses as much as digits as its factorization.

213706253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 213706253 is about 14618.6953248229. The cubic root of 213706253 is about 597.8685976910.

The spelling of 213706253 in words is "two hundred thirteen million, seven hundred six thousand, two hundred fifty-three".