57072013 has 4 divisors (see below), whose sum is σ = 57244768. Its totient is φ = 56899260.

The previous prime is 57072011. The next prime is 57072031. The reversal of 57072013 is 31027075.

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 57072013 - 2¹ = 57072011 is a prime.

It is a super-3 number, since 3×57072013³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57072011) 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, 85881 + ... + 86542.

It is an arithmetic number, because the mean of its divisors is an integer number (14311192).

Almost surely, 2^57072013 is an apocalyptic number.

It is an amenable number.

57072013 is a deficient number, since it is larger than the sum of its proper divisors (172755).

57072013 is a wasteful number, since it uses less digits than its factorization.

57072013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172754.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 57072013 is about 7554.6021073250. The cubic root of 57072013 is about 385.0121163331.

Adding to 57072013 its reverse (31027075), we get a palindrome (88099088).

The spelling of 57072013 in words is "fifty-seven million, seventy-two thousand, thirteen".