213553399 has 2 divisors, whose sum is σ = 213553400. Its totient is φ = 213553398.

The previous prime is 213553387. The next prime is 213553423. The reversal of 213553399 is 993355312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213553399 - 2¹⁵ = 213520631 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213553499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106776699 + 106776700.

It is an arithmetic number, because the mean of its divisors is an integer number (106776700).

Almost surely, 2^213553399 is an apocalyptic number.

213553399 is a deficient number, since it is larger than the sum of its proper divisors (1).

213553399 is an equidigital number, since it uses as much as digits as its factorization.

213553399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109350, while the sum is 40.

The square root of 213553399 is about 14613.4663581232. The cubic root of 213553399 is about 597.7260212928.

The spelling of 213553399 in words is "two hundred thirteen million, five hundred fifty-three thousand, three hundred ninety-nine".