57731144321 has 4 divisors (see below), whose sum is σ = 57734161200. Its totient is φ = 57728127444.

The previous prime is 57731144297. The next prime is 57731144369. The reversal of 57731144321 is 12344113775.

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 57731144321 - 2⁶ = 57731144257 is a prime.

It is a super-2 number, since 2×57731144321² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57731144021) 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, 1479551 + ... + 1518068.

It is an arithmetic number, because the mean of its divisors is an integer number (14433540300).

Almost surely, 2^57731144321 is an apocalyptic number.

It is an amenable number.

57731144321 is a deficient number, since it is larger than the sum of its proper divisors (3016879).

57731144321 is a wasteful number, since it uses less digits than its factorization.

57731144321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3016878.

The product of its digits is 70560, while the sum is 38.

The spelling of 57731144321 in words is "fifty-seven billion, seven hundred thirty-one million, one hundred forty-four thousand, three hundred twenty-one".