53221404 has 12 divisors (see below), whose sum is σ = 124183304. Its totient is φ = 17740464.

The previous prime is 53221369. The next prime is 53221417. The reversal of 53221404 is 40412235.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2217547 + ... + 2217570.

Almost surely, 2^53221404 is an apocalyptic number.

It is an amenable number.

53221404 is an abundant number, since it is smaller than the sum of its proper divisors (70961900).

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

53221404 is a wasteful number, since it uses less digits than its factorization.

53221404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4435124 (or 4435122 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 53221404 is about 7295.3001309062. The cubic root of 53221404 is about 376.1509032886.

Adding to 53221404 its reverse (40412235), we get a palindrome (93633639).

The spelling of 53221404 in words is "fifty-three million, two hundred twenty-one thousand, four hundred four".