57123533 has 4 divisors (see below), whose sum is σ = 59093340. Its totient is φ = 55153728.

The previous prime is 57123529. The next prime is 57123541. The reversal of 57123533 is 33532175.

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 30052324 + 27071209 = 5482^2 + 5203^2 .

It is a cyclic number.

It is not a de Polignac number, because 57123533 - 2² = 57123529 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 1969777 = 57123533 / (5 + 7 + 1 + 2 + 3 + 5 + 3 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57123496 and 57123505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57123503) 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, 984860 + ... + 984917.

It is an arithmetic number, because the mean of its divisors is an integer number (14773335).

Almost surely, 2^57123533 is an apocalyptic number.

It is an amenable number.

57123533 is a deficient number, since it is larger than the sum of its proper divisors (1969807).

57123533 is a wasteful number, since it uses less digits than its factorization.

57123533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969806.

The product of its digits is 9450, while the sum is 29.

The square root of 57123533 is about 7558.0111801981. The cubic root of 57123533 is about 385.1279340954.

The spelling of 57123533 in words is "fifty-seven million, one hundred twenty-three thousand, five hundred thirty-three".