53220405 has 16 divisors (see below), whose sum is σ = 97317504. Its totient is φ = 24329280.

The previous prime is 53220379. The next prime is 53220407. The reversal of 53220405 is 50402235.

It is not a de Polignac number, because 53220405 - 2⁵ = 53220373 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53220407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253326 + ... + 253535.

It is an arithmetic number, because the mean of its divisors is an integer number (6082344).

Almost surely, 2^53220405 is an apocalyptic number.

It is an amenable number.

53220405 is a deficient number, since it is larger than the sum of its proper divisors (44097099).

53220405 is a wasteful number, since it uses less digits than its factorization.

53220405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506876.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 53220405 is about 7295.2316618460. The cubic root of 53220405 is about 376.1485497423.

The spelling of 53220405 in words is "fifty-three million, two hundred twenty thousand, four hundred five".