2355722981 has 2 divisors, whose sum is σ = 2355722982. Its totient is φ = 2355722980.

The previous prime is 2355722899. The next prime is 2355722989. The reversal of 2355722981 is 1892275532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1607208100 + 748514881 = 40090^2 + 27359^2 .

It is a cyclic number.

It is not a de Polignac number, because 2355722981 - 2²² = 2351528677 is a prime.

It is a super-2 number, since 2×2355722981² = 11098861526423052722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2355722989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1177861490 + 1177861491.

It is an arithmetic number, because the mean of its divisors is an integer number (1177861491).

Almost surely, 2^2355722981 is an apocalyptic number.

It is an amenable number.

2355722981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2355722981 is an equidigital number, since it uses as much as digits as its factorization.

2355722981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 44.

The square root of 2355722981 is about 48535.7907218992. The cubic root of 2355722981 is about 1330.5812713507.

The spelling of 2355722981 in words is "two billion, three hundred fifty-five million, seven hundred twenty-two thousand, nine hundred eighty-one".