2000155501 has 2 divisors, whose sum is σ = 2000155502. Its totient is φ = 2000155500.

The previous prime is 2000155481. The next prime is 2000155561. The reversal of 2000155501 is 1055510002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1962578601 + 37576900 = 44301^2 + 6130^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000155501 - 2¹¹ = 2000153453 is a prime.

It is a super-2 number, since 2×2000155501² = 8001244056361122002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2000155561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000077750 + 1000077751.

It is an arithmetic number, because the mean of its divisors is an integer number (1000077751).

Almost surely, 2^2000155501 is an apocalyptic number.

It is an amenable number.

2000155501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000155501 is an equidigital number, since it uses as much as digits as its factorization.

2000155501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 2000155501 is about 44723.0980702366. The cubic root of 2000155501 is about 1259.9537022125.

Adding to 2000155501 its reverse (1055510002), we get a palindrome (3055665503).

The spelling of 2000155501 in words is "two billion, one hundred fifty-five thousand, five hundred one".