57144045421 has 4 divisors (see below), whose sum is σ = 57649745052. Its totient is φ = 56638345792.

The previous prime is 57144045419. The next prime is 57144045443. The reversal of 57144045421 is 12454044175.

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 2850385321 + 54293660100 = 53389^2 + 233010^2 .

It is a cyclic number.

It is not a de Polignac number, because 57144045421 - 2¹ = 57144045419 is a prime.

It is a super-2 number, since 2×57144045421² (a number of 22 digits) contains 22 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 (57144045401) 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, 252849646 + ... + 252849871.

It is an arithmetic number, because the mean of its divisors is an integer number (14412436263).

Almost surely, 2^57144045421 is an apocalyptic number.

It is an amenable number.

57144045421 is a deficient number, since it is larger than the sum of its proper divisors (505699631).

57144045421 is a wasteful number, since it uses less digits than its factorization.

57144045421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505699630.

The product of its (nonzero) digits is 89600, while the sum is 37.

Adding to 57144045421 its reverse (12454044175), we get a palindrome (69598089596).

The spelling of 57144045421 in words is "fifty-seven billion, one hundred forty-four million, forty-five thousand, four hundred twenty-one".