2015320901 has 4 divisors (see below), whose sum is σ = 2198531904. Its totient is φ = 1832109900.

The previous prime is 2015320897. The next prime is 2015320949. The reversal of 2015320901 is 1090235102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2015320901 - 2² = 2015320897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015320991) 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 in 3 ways as a sum of consecutive naturals, for example, 91605485 + ... + 91605506.

It is an arithmetic number, because the mean of its divisors is an integer number (549632976).

Almost surely, 2^2015320901 is an apocalyptic number.

It is an amenable number.

2015320901 is a deficient number, since it is larger than the sum of its proper divisors (183211003).

2015320901 is a wasteful number, since it uses less digits than its factorization.

2015320901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183211002.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 2015320901 is about 44892.3256359035. The cubic root of 2015320901 is about 1263.1300572556.

The spelling of 2015320901 in words is "two billion, fifteen million, three hundred twenty thousand, nine hundred one".