53455220 has 96 divisors (see below), whose sum is σ = 144281088. Its totient is φ = 16169472.

The previous prime is 53455211. The next prime is 53455231. The reversal of 53455220 is 2255435.

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

It is a self number, because there is not a number n which added to its sum of digits gives 53455220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41222 + ... + 42498.

It is an arithmetic number, because the mean of its divisors is an integer number (1502928).

Almost surely, 2^53455220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53455220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72140544).

53455220 is an abundant number, since it is smaller than the sum of its proper divisors (90825868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53455220 is a wasteful number, since it uses less digits than its factorization.

53455220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329 (or 1327 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 53455220 is about 7311.3076805726. The cubic root of 53455220 is about 376.7009427480.

The spelling of 53455220 in words is "fifty-three million, four hundred fifty-five thousand, two hundred twenty".