55421221353401 has 8 divisors (see below), whose sum is σ = 55456753993608. Its totient is φ = 55385694000000.

The previous prime is 55421221353371. The next prime is 55421221353479. The reversal of 55421221353401 is 10435312212455.

It can be written as a sum of positive squares in 4 ways, for example, as 4789116444025 + 50632104909376 = 2188405^2 + 7115624^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55421221353401 - 2³⁸ = 55146343446457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55421221353481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19758551 + ... + 22388451.

It is an arithmetic number, because the mean of its divisors is an integer number (6932094249201).

Almost surely, 2^{55421221353401} is an apocalyptic number.

It is an amenable number.

55421221353401 is a deficient number, since it is larger than the sum of its proper divisors (35532640207).

55421221353401 is a wasteful number, since it uses less digits than its factorization.

55421221353401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2643403.

The product of its (nonzero) digits is 144000, while the sum is 38.

Adding to 55421221353401 its reverse (10435312212455), we get a palindrome (65856533565856).

The spelling of 55421221353401 in words is "fifty-five trillion, four hundred twenty-one billion, two hundred twenty-one million, three hundred fifty-three thousand, four hundred one".