53403506 has 32 divisors (see below), whose sum is σ = 90729408. Its totient is φ = 23405760.

The previous prime is 53403503. The next prime is 53403517. The reversal of 53403506 is 60530435.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (53403503) 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 15 ways as a sum of consecutive naturals, for example, 40721 + ... + 42011.

It is an arithmetic number, because the mean of its divisors is an integer number (2835294).

Almost surely, 2^53403506 is an apocalyptic number.

53403506 is a deficient number, since it is larger than the sum of its proper divisors (37325902).

53403506 is a wasteful number, since it uses less digits than its factorization.

53403506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 53403506 is about 7307.7702481674. The cubic root of 53403506 is about 376.5794267203.

The spelling of 53403506 in words is "fifty-three million, four hundred three thousand, five hundred six".