57207149 has 4 divisors (see below), whose sum is σ = 57264636. Its totient is φ = 57149664.

The previous prime is 57207113. The next prime is 57207151. The reversal of 57207149 is 94170275.

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 14212900 + 42994249 = 3770^2 + 6557^2 .

It is a cyclic number.

It is not a de Polignac number, because 57207149 - 2²⁰ = 56158573 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 (57207179) 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, 27224 + ... + 29249.

It is an arithmetic number, because the mean of its divisors is an integer number (14316159).

Almost surely, 2^57207149 is an apocalyptic number.

It is an amenable number.

57207149 is a deficient number, since it is larger than the sum of its proper divisors (57487).

57207149 is a wasteful number, since it uses less digits than its factorization.

57207149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57486.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 57207149 is about 7563.5407713583. The cubic root of 57207149 is about 385.3157560305.

The spelling of 57207149 in words is "fifty-seven million, two hundred seven thousand, one hundred forty-nine".