57235909 has 4 divisors (see below), whose sum is σ = 57251916. Its totient is φ = 57219904.

The previous prime is 57235907. The next prime is 57235921. The reversal of 57235909 is 90953275.

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 56295009 + 940900 = 7503^2 + 970^2 .

It is a cyclic number.

It is not a de Polignac number, because 57235909 - 2¹ = 57235907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57235907) 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, 87 + ... + 10699.

It is an arithmetic number, because the mean of its divisors is an integer number (14312979).

Almost surely, 2^57235909 is an apocalyptic number.

It is an amenable number.

57235909 is a deficient number, since it is larger than the sum of its proper divisors (16007).

57235909 is a wasteful number, since it uses less digits than its factorization.

57235909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16006.

The product of its (nonzero) digits is 85050, while the sum is 40.

The square root of 57235909 is about 7565.4417584170. The cubic root of 57235909 is about 385.3803157042.

It can be divided in two parts, 572 and 35909, that added together give a square (36481 = 191²).

The spelling of 57235909 in words is "fifty-seven million, two hundred thirty-five thousand, nine hundred nine".