55323423520021 has 8 divisors (see below), whose sum is σ = 55337842463904. Its totient is φ = 55309005084240.

The previous prime is 55323423520007. The next prime is 55323423520031. The reversal of 55323423520021 is 12002532432355.

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 55323423520021 - 2⁷ = 55323423519893 is a prime.

It is a super-2 number, since 2×55323423520021² (a number of 28 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 (55323423520031) 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, 321242266 + ... + 321414436.

It is an arithmetic number, because the mean of its divisors is an integer number (6917230307988).

Almost surely, 2^{55323423520021} is an apocalyptic number.

It is an amenable number.

55323423520021 is a deficient number, since it is larger than the sum of its proper divisors (14418943883).

55323423520021 is a wasteful number, since it uses less digits than its factorization.

55323423520021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254051.

The product of its (nonzero) digits is 216000, while the sum is 37.

Adding to 55323423520021 its reverse (12002532432355), we get a palindrome (67325955952376).

The spelling of 55323423520021 in words is "fifty-five trillion, three hundred twenty-three billion, four hundred twenty-three million, five hundred twenty thousand, twenty-one".