220038391 has 2 divisors, whose sum is σ = 220038392. Its totient is φ = 220038390.

The previous prime is 220038383. The next prime is 220038433. The reversal of 220038391 is 193830022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220038391 - 2³ = 220038383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220038991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110019195 + 110019196.

It is an arithmetic number, because the mean of its divisors is an integer number (110019196).

Almost surely, 2^220038391 is an apocalyptic number.

220038391 is a deficient number, since it is larger than the sum of its proper divisors (1).

220038391 is an equidigital number, since it uses as much as digits as its factorization.

220038391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 220038391 is about 14833.6910780830. The cubic root of 220038391 is about 603.7161866678.

The spelling of 220038391 in words is "two hundred twenty million, thirty-eight thousand, three hundred ninety-one".