57161205 has 12 divisors (see below), whose sum is σ = 99079500. Its totient is φ = 30485952.

The previous prime is 57161173. The next prime is 57161207. The reversal of 57161205 is 50216175.

It can be written as a sum of positive squares in 2 ways, for example, as 42850116 + 14311089 = 6546^2 + 3783^2 .

It is not a de Polignac number, because 57161205 - 2⁵ = 57161173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57161207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 635080 + ... + 635169.

It is an arithmetic number, because the mean of its divisors is an integer number (8256625).

Almost surely, 2^57161205 is an apocalyptic number.

It is an amenable number.

57161205 is a deficient number, since it is larger than the sum of its proper divisors (41918295).

57161205 is a wasteful number, since it uses less digits than its factorization.

57161205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270260 (or 1270257 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 57161205 is about 7560.5029594598. The cubic root of 57161205 is about 385.2125772688.

It can be divided in two parts, 571 and 61205, that added together give a triangular number (61776 = T₃₅₁).

The spelling of 57161205 in words is "fifty-seven million, one hundred sixty-one thousand, two hundred five".