2000155481 has 2 divisors, whose sum is σ = 2000155482. Its totient is φ = 2000155480.

The previous prime is 2000155477. The next prime is 2000155501. The reversal of 2000155481 is 1845510002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1452829456 + 547326025 = 38116^2 + 23395^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000155481 - 2² = 2000155477 is a prime.

It is a super-2 number, since 2×2000155481² = 8001243896348682722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2000155481.

It is not a weakly prime, because it can be changed into another prime (2000155081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000077740 + 1000077741.

It is an arithmetic number, because the mean of its divisors is an integer number (1000077741).

Almost surely, 2^2000155481 is an apocalyptic number.

It is an amenable number.

2000155481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000155481 is an equidigital number, since it uses as much as digits as its factorization.

2000155481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 2000155481 is about 44723.0978466385. The cubic root of 2000155481 is about 1259.9536980130.

Adding to 2000155481 its reverse (1845510002), we get a palindrome (3845665483).

The spelling of 2000155481 in words is "two billion, one hundred fifty-five thousand, four hundred eighty-one".