53257397 has 4 divisors (see below), whose sum is σ = 55572960. Its totient is φ = 50941836.

The previous prime is 53257387. The next prime is 53257403. The reversal of 53257397 is 79375235.

53257397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53257397 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 (53257307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1157747 + ... + 1157792.

It is an arithmetic number, because the mean of its divisors is an integer number (13893240).

Almost surely, 2^53257397 is an apocalyptic number.

It is an amenable number.

53257397 is a deficient number, since it is larger than the sum of its proper divisors (2315563).

53257397 is a wasteful number, since it uses less digits than its factorization.

53257397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315562.

The product of its digits is 198450, while the sum is 41.

The square root of 53257397 is about 7297.7665761519. The cubic root of 53257397 is about 376.2356796351.

The spelling of 53257397 in words is "fifty-three million, two hundred fifty-seven thousand, three hundred ninety-seven".