57281069 has 4 divisors (see below), whose sum is σ = 58829244. Its totient is φ = 55732896.

The previous prime is 57281051. The next prime is 57281089. The reversal of 57281069 is 96018275.

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 35844169 + 21436900 = 5987^2 + 4630^2 .

It is a cyclic number.

It is not a de Polignac number, because 57281069 - 2¹⁶ = 57215533 is a prime.

It is a super-2 number, since 2×57281069² = 6562241731565522, which 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 (57281009) 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, 774032 + ... + 774105.

It is an arithmetic number, because the mean of its divisors is an integer number (14707311).

Almost surely, 2^57281069 is an apocalyptic number.

It is an amenable number.

57281069 is a deficient number, since it is larger than the sum of its proper divisors (1548175).

57281069 is a wasteful number, since it uses less digits than its factorization.

57281069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548174.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 57281069 is about 7568.4257940473. The cubic root of 57281069 is about 385.4816460292.

The spelling of 57281069 in words is "fifty-seven million, two hundred eighty-one thousand, sixty-nine".