53145523 has 4 divisors (see below), whose sum is σ = 53343360. Its totient is φ = 52947688.

The previous prime is 53145517. The next prime is 53145577. The reversal of 53145523 is 32554135.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53145523 - 2⁹ = 53145011 is a prime.

It is a super-2 number, since 2×53145523² = 5648893229887058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53145491 and 53145500.

It is not an unprimeable number, because it can be changed into a prime (53145503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98515 + ... + 99052.

It is an arithmetic number, because the mean of its divisors is an integer number (13335840).

Almost surely, 2^53145523 is an apocalyptic number.

53145523 is a deficient number, since it is larger than the sum of its proper divisors (197837).

53145523 is a wasteful number, since it uses less digits than its factorization.

53145523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197836.

The product of its digits is 9000, while the sum is 28.

The square root of 53145523 is about 7290.0975987980. The cubic root of 53145523 is about 375.9720511706.

Adding to 53145523 its reverse (32554135), we get a palindrome (85699658).

The spelling of 53145523 in words is "fifty-three million, one hundred forty-five thousand, five hundred twenty-three".