53021403221 has 16 divisors (see below), whose sum is σ = 55589587200. Its totient is φ = 50504303808.

The previous prime is 53021403179. The next prime is 53021403277. The reversal of 53021403221 is 12230412035.

It is a cyclic number.

It is not a de Polignac number, because 53021403221 - 2⁶ = 53021403157 is a prime.

It is a super-2 number, since 2×53021403221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53021463221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1715315 + ... + 1745951.

It is an arithmetic number, because the mean of its divisors is an integer number (3474349200).

Almost surely, 2^53021403221 is an apocalyptic number.

It is an amenable number.

53021403221 is a deficient number, since it is larger than the sum of its proper divisors (2568183979).

53021403221 is a wasteful number, since it uses less digits than its factorization.

53021403221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31468.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 53021403221 its reverse (12230412035), we get a palindrome (65251815256).

The spelling of 53021403221 in words is "fifty-three billion, twenty-one million, four hundred three thousand, two hundred twenty-one".