2011520401 has 4 divisors (see below), whose sum is σ = 2194385904. Its totient is φ = 1828654900.

The previous prime is 2011520387. The next prime is 2011520411. The reversal of 2011520401 is 1040251102.

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 a de Polignac number, because none of the positive numbers 2^k-2011520401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011520411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91432735 + ... + 91432756.

It is an arithmetic number, because the mean of its divisors is an integer number (548596476).

Almost surely, 2^2011520401 is an apocalyptic number.

It is an amenable number.

2011520401 is a deficient number, since it is larger than the sum of its proper divisors (182865503).

2011520401 is a wasteful number, since it uses less digits than its factorization.

2011520401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182865502.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 2011520401 is about 44849.9765997709. The cubic root of 2011520401 is about 1262.3355524264.

Adding to 2011520401 its reverse (1040251102), we get a palindrome (3051771503).

The spelling of 2011520401 in words is "two billion, eleven million, five hundred twenty thousand, four hundred one".