53421123 has 24 divisors (see below), whose sum is σ = 87735312. Its totient is φ = 28729344.

The previous prime is 53421097. The next prime is 53421127. The reversal of 53421123 is 32112435.

It is not a de Polignac number, because 53421123 - 2⁶ = 53421059 is a prime.

It is a super-2 number, since 2×53421123² = 5707632765162258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 53421123.

It is not an unprimeable number, because it can be changed into a prime (53421127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8190 + ... + 13187.

It is an arithmetic number, because the mean of its divisors is an integer number (3655638).

Almost surely, 2^53421123 is an apocalyptic number.

53421123 is a deficient number, since it is larger than the sum of its proper divisors (34314189).

53421123 is a wasteful number, since it uses less digits than its factorization.

53421123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21411 (or 21404 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 53421123 is about 7308.9755096046. The cubic root of 53421123 is about 376.6208314325.

Adding to 53421123 its reverse (32112435), we get a palindrome (85533558).

The spelling of 53421123 in words is "fifty-three million, four hundred twenty-one thousand, one hundred twenty-three".