53399220 has 144 divisors (see below), whose sum is σ = 178573248. Its totient is φ = 11880960.

The previous prime is 53399183. The next prime is 53399233. The reversal of 53399220 is 2299335.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 120319 + ... + 120761.

It is an arithmetic number, because the mean of its divisors is an integer number (1240092).

Almost surely, 2^53399220 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 53399220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89286624).

53399220 is an abundant number, since it is smaller than the sum of its proper divisors (125174028).

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

53399220 is a wasteful number, since it uses less digits than its factorization.

53399220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 33.

The square root of 53399220 is about 7307.4769927794. The cubic root of 53399220 is about 376.5693520846.

The spelling of 53399220 in words is "fifty-three million, three hundred ninety-nine thousand, two hundred twenty".