210235450391 has 2 divisors, whose sum is σ = 210235450392. Its totient is φ = 210235450390.

The previous prime is 210235450309. The next prime is 210235450423. The reversal of 210235450391 is 193054532012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210235450391 - 2²² = 210231256087 is a prime.

It is a super-2 number, since 2×210235450391² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210235450301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105117725195 + 105117725196.

It is an arithmetic number, because the mean of its divisors is an integer number (105117725196).

Almost surely, 2^210235450391 is an apocalyptic number.

210235450391 is a deficient number, since it is larger than the sum of its proper divisors (1).

210235450391 is an equidigital number, since it uses as much as digits as its factorization.

210235450391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 210235450391 in words is "two hundred ten billion, two hundred thirty-five million, four hundred fifty thousand, three hundred ninety-one".