211213357 has 2 divisors, whose sum is σ = 211213358. Its totient is φ = 211213356.

The previous prime is 211213313. The next prime is 211213363. The reversal of 211213357 is 753312112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204089796 + 7123561 = 14286^2 + 2669^2 .

It is a cyclic number.

It is not a de Polignac number, because 211213357 - 2⁷ = 211213229 is a prime.

It is a super-2 number, since 2×211213357² = 89222164350418898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211213397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105606678 + 105606679.

It is an arithmetic number, because the mean of its divisors is an integer number (105606679).

Almost surely, 2^211213357 is an apocalyptic number.

It is an amenable number.

211213357 is a deficient number, since it is larger than the sum of its proper divisors (1).

211213357 is an equidigital number, since it uses as much as digits as its factorization.

211213357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 25.

The square root of 211213357 is about 14533.1812415589. The cubic root of 211213357 is about 595.5347751945.

Adding to 211213357 its reverse (753312112), we get a palindrome (964525469).

The spelling of 211213357 in words is "two hundred eleven million, two hundred thirteen thousand, three hundred fifty-seven".