211525401979 has 2 divisors, whose sum is σ = 211525401980. Its totient is φ = 211525401978.

The previous prime is 211525401947. The next prime is 211525402057. The reversal of 211525401979 is 979104525112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211525401979 - 2⁵ = 211525401947 is a prime.

It is not a weakly prime, because it can be changed into another prime (211525401079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105762700989 + 105762700990.

It is an arithmetic number, because the mean of its divisors is an integer number (105762700990).

Almost surely, 2^211525401979 is an apocalyptic number.

211525401979 is a deficient number, since it is larger than the sum of its proper divisors (1).

211525401979 is an equidigital number, since it uses as much as digits as its factorization.

211525401979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 46.

The spelling of 211525401979 in words is "two hundred eleven billion, five hundred twenty-five million, four hundred one thousand, nine hundred seventy-nine".