1572550013 has 4 divisors (see below), whose sum is σ = 1594091868. Its totient is φ = 1551008160.

The previous prime is 1572550009. The next prime is 1572550019. The reversal of 1572550013 is 3100552751.

It is a happy number.

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 956170084 + 616379929 = 30922^2 + 24827^2 .

It is a cyclic number.

It is not a de Polignac number, because 1572550013 - 2² = 1572550009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1572550019) 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, 10770818 + ... + 10770963.

It is an arithmetic number, because the mean of its divisors is an integer number (398522967).

Almost surely, 2^1572550013 is an apocalyptic number.

It is an amenable number.

1572550013 is a deficient number, since it is larger than the sum of its proper divisors (21541855).

1572550013 is an equidigital number, since it uses as much as digits as its factorization.

1572550013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21541854.

The product of its (nonzero) digits is 5250, while the sum is 29.

The square root of 1572550013 is about 39655.3907180348. The cubic root of 1572550013 is about 1162.8797881618.

The spelling of 1572550013 in words is "one billion, five hundred seventy-two million, five hundred fifty thousand, thirteen".