220195387 has 4 divisors (see below), whose sum is σ = 227298496. Its totient is φ = 213092280.

The previous prime is 220195363. The next prime is 220195429. The reversal of 220195387 is 783591022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 783591022 = 2 ⋅391795511.

It is a cyclic number.

It is not a de Polignac number, because 220195387 - 2¹¹ = 220193339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20195387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3551508 + ... + 3551569.

It is an arithmetic number, because the mean of its divisors is an integer number (56824624).

Almost surely, 2^220195387 is an apocalyptic number.

220195387 is a deficient number, since it is larger than the sum of its proper divisors (7103109).

220195387 is an equidigital number, since it uses as much as digits as its factorization.

220195387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7103108.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 220195387 is about 14838.9820068629. The cubic root of 220195387 is about 603.8597350930.

The spelling of 220195387 in words is "two hundred twenty million, one hundred ninety-five thousand, three hundred eighty-seven".