220504397 has 2 divisors, whose sum is σ = 220504398. Its totient is φ = 220504396.

The previous prime is 220504391. The next prime is 220504463. The reversal of 220504397 is 793405022.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209120521 + 11383876 = 14461^2 + 3374^2 .

It is a cyclic number.

It is not a de Polignac number, because 220504397 - 2²² = 216310093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220504391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110252198 + 110252199.

It is an arithmetic number, because the mean of its divisors is an integer number (110252199).

Almost surely, 2^220504397 is an apocalyptic number.

It is an amenable number.

220504397 is a deficient number, since it is larger than the sum of its proper divisors (1).

220504397 is an equidigital number, since it uses as much as digits as its factorization.

220504397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 220504397 is about 14849.3904588707. The cubic root of 220504397 is about 604.1420774857.

The spelling of 220504397 in words is "two hundred twenty million, five hundred four thousand, three hundred ninety-seven".