1955220601 has 2 divisors, whose sum is σ = 1955220602. Its totient is φ = 1955220600.

The previous prime is 1955220577. The next prime is 1955220607. The reversal of 1955220601 is 1060225591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1816805376 + 138415225 = 42624^2 + 11765^2 .

It is a cyclic number.

It is not a de Polignac number, because 1955220601 - 2¹¹ = 1955218553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1955220607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977610300 + 977610301.

It is an arithmetic number, because the mean of its divisors is an integer number (977610301).

Almost surely, 2^1955220601 is an apocalyptic number.

It is an amenable number.

1955220601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1955220601 is an equidigital number, since it uses as much as digits as its factorization.

1955220601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1955220601 is about 44217.8764867785. The cubic root of 1955220601 is about 1250.4469017507.

The spelling of 1955220601 in words is "one billion, nine hundred fifty-five million, two hundred twenty thousand, six hundred one".