220525391 has 2 divisors, whose sum is σ = 220525392. Its totient is φ = 220525390.

The previous prime is 220525379. The next prime is 220525423. The reversal of 220525391 is 193525022.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220525391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220525321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110262695 + 110262696.

It is an arithmetic number, because the mean of its divisors is an integer number (110262696).

Almost surely, 2^220525391 is an apocalyptic number.

220525391 is a deficient number, since it is larger than the sum of its proper divisors (1).

220525391 is an equidigital number, since it uses as much as digits as its factorization.

220525391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 220525391 is about 14850.0973397483. The cubic root of 220525391 is about 604.1612501287.

The spelling of 220525391 in words is "two hundred twenty million, five hundred twenty-five thousand, three hundred ninety-one".