53185897 has 4 divisors (see below), whose sum is σ = 54483156. Its totient is φ = 51888640.

The previous prime is 53185889. The next prime is 53185903. The reversal of 53185897 is 79858135.

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 10361961 + 42823936 = 3219^2 + 6544^2 .

It is a cyclic number.

It is not a de Polignac number, because 53185897 - 2³ = 53185889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53185817) 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, 648568 + ... + 648649.

It is an arithmetic number, because the mean of its divisors is an integer number (13620789).

Almost surely, 2^53185897 is an apocalyptic number.

It is an amenable number.

53185897 is a deficient number, since it is larger than the sum of its proper divisors (1297259).

53185897 is a wasteful number, since it uses less digits than its factorization.

53185897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297258.

The product of its digits is 302400, while the sum is 46.

The square root of 53185897 is about 7292.8661718148. The cubic root of 53185897 is about 376.0672341855.

The spelling of 53185897 in words is "fifty-three million, one hundred eighty-five thousand, eight hundred ninety-seven".