2013521451 has 4 divisors (see below), whose sum is σ = 2684695272. Its totient is φ = 1342347632.

The previous prime is 2013521449. The next prime is 2013521473. The reversal of 2013521451 is 1541253102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2013521451 - 2¹ = 2013521449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2013521401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335586906 + ... + 335586911.

It is an arithmetic number, because the mean of its divisors is an integer number (671173818).

Almost surely, 2^2013521451 is an apocalyptic number.

2013521451 is a deficient number, since it is larger than the sum of its proper divisors (671173821).

2013521451 is an equidigital number, since it uses as much as digits as its factorization.

2013521451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671173820.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 2013521451 is about 44872.2793158538. The cubic root of 2013521451 is about 1262.7540019738.

Adding to 2013521451 its reverse (1541253102), we get a palindrome (3554774553).

The spelling of 2013521451 in words is "two billion, thirteen million, five hundred twenty-one thousand, four hundred fifty-one".