2155032001 has 4 divisors (see below), whose sum is σ = 2155540612. Its totient is φ = 2154523392.

The previous prime is 2155031987. The next prime is 2155032007. The reversal of 2155032001 is 1002305512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1080831376 + 1074200625 = 32876^2 + 32775^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155032001 - 2⁵ = 2155031969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2155032001.

It is not an unprimeable number, because it can be changed into a prime (2155032007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247896 + ... + 256441.

It is an arithmetic number, because the mean of its divisors is an integer number (538885153).

Almost surely, 2^2155032001 is an apocalyptic number.

It is an amenable number.

2155032001 is a deficient number, since it is larger than the sum of its proper divisors (508611).

2155032001 is an equidigital number, since it uses as much as digits as its factorization.

2155032001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508610.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 2155032001 is about 46422.3222275663. The cubic root of 2155032001 is about 1291.6690134919.

Adding to 2155032001 its reverse (1002305512), we get a palindrome (3157337513).

The spelling of 2155032001 in words is "two billion, one hundred fifty-five million, thirty-two thousand, one".