53221392 has 120 divisors (see below), whose sum is σ = 174947136. Its totient is φ = 14784768.

The previous prime is 53221369. The next prime is 53221417. The reversal of 53221392 is 29312235.

53221392 is a `hidden beast` number, since 53 + 221 + 392 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36583 + ... + 38009.

Almost surely, 2^53221392 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 53221392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87473568).

53221392 is an abundant number, since it is smaller than the sum of its proper divisors (121725744).

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

53221392 is a wasteful number, since it uses less digits than its factorization.

53221392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485 (or 1476 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 53221392 is about 7295.2993084588. The cubic root of 53221392 is about 376.1508750179.

It can be divided in two parts, 53 and 221392, that added together give a triangular number (221445 = T₆₆₅).

The spelling of 53221392 in words is "fifty-three million, two hundred twenty-one thousand, three hundred ninety-two".