53420403 has 4 divisors (see below), whose sum is σ = 71227208. Its totient is φ = 35613600.

The previous prime is 53420401. The next prime is 53420413. The reversal of 53420403 is 30402435.

It is a happy number.

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

It is not a de Polignac number, because 53420403 - 2¹ = 53420401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53420403.

It is not an unprimeable number, because it can be changed into a prime (53420401) 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, 8903398 + ... + 8903403.

It is an arithmetic number, because the mean of its divisors is an integer number (17806802).

Almost surely, 2^53420403 is an apocalyptic number.

53420403 is a deficient number, since it is larger than the sum of its proper divisors (17806805).

53420403 is a wasteful number, since it uses less digits than its factorization.

53420403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17806804.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 53420403 is about 7308.9262549297. The cubic root of 53420403 is about 376.6191394163.

Adding to 53420403 its reverse (30402435), we get a palindrome (83822838).

The spelling of 53420403 in words is "fifty-three million, four hundred twenty thousand, four hundred three".