211523153 has 2 divisors, whose sum is σ = 211523154. Its totient is φ = 211523152.

The previous prime is 211523113. The next prime is 211523161. The reversal of 211523153 is 351325112.

It is a happy number.

211523153 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169312144 + 42211009 = 13012^2 + 6497^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211523153 is a prime.

It is a super-2 number, since 2×211523153² = 89484088510122818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211523113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105761576 + 105761577.

It is an arithmetic number, because the mean of its divisors is an integer number (105761577).

Almost surely, 2^211523153 is an apocalyptic number.

It is an amenable number.

211523153 is a deficient number, since it is larger than the sum of its proper divisors (1).

211523153 is an equidigital number, since it uses as much as digits as its factorization.

211523153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 900, while the sum is 23.

The square root of 211523153 is about 14543.8355670023. The cubic root of 211523153 is about 595.8257987126.

Adding to 211523153 its reverse (351325112), we get a palindrome (562848265).

The spelling of 211523153 in words is "two hundred eleven million, five hundred twenty-three thousand, one hundred fifty-three".