213251011 has 2 divisors, whose sum is σ = 213251012. Its totient is φ = 213251010.

The previous prime is 213250997. The next prime is 213251023. The reversal of 213251011 is 110152312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213251011 - 2¹¹ = 213248963 is a prime.

It is not a weakly prime, because it can be changed into another prime (213251081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106625505 + 106625506.

It is an arithmetic number, because the mean of its divisors is an integer number (106625506).

Almost surely, 2^213251011 is an apocalyptic number.

213251011 is a deficient number, since it is larger than the sum of its proper divisors (1).

213251011 is an equidigital number, since it uses as much as digits as its factorization.

213251011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 213251011 is about 14603.1164824499. The cubic root of 213251011 is about 597.4437647161.

The spelling of 213251011 in words is "two hundred thirteen million, two hundred fifty-one thousand, eleven".