220470420491 has 2 divisors, whose sum is σ = 220470420492. Its totient is φ = 220470420490.

The previous prime is 220470420473. The next prime is 220470420493. The reversal of 220470420491 is 194024074022.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220470420491 is a prime.

It is a super-2 number, since 2×220470420491² (a number of 23 digits) contains 22 as substring.

Together with 220470420493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (220470420493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110235210245 + 110235210246.

It is an arithmetic number, because the mean of its divisors is an integer number (110235210246).

Almost surely, 2^220470420491 is an apocalyptic number.

220470420491 is a deficient number, since it is larger than the sum of its proper divisors (1).

220470420491 is an equidigital number, since it uses as much as digits as its factorization.

220470420491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 220470420491 in words is "two hundred twenty billion, four hundred seventy million, four hundred twenty thousand, four hundred ninety-one".