1220175871 has 2 divisors, whose sum is σ = 1220175872. Its totient is φ = 1220175870.

The previous prime is 1220175823. The next prime is 1220175889. The reversal of 1220175871 is 1785710221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220175871 - 2⁷ = 1220175743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220175811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610087935 + 610087936.

It is an arithmetic number, because the mean of its divisors is an integer number (610087936).

Almost surely, 2^1220175871 is an apocalyptic number.

1220175871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220175871 is an equidigital number, since it uses as much as digits as its factorization.

1220175871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7840, while the sum is 34.

The square root of 1220175871 is about 34931.0158884622. The cubic root of 1220175871 is about 1068.5810728709.

The spelling of 1220175871 in words is "one billion, two hundred twenty million, one hundred seventy-five thousand, eight hundred seventy-one".