55451533321 has 4 divisors (see below), whose sum is σ = 55619060944. Its totient is φ = 55284005700.

The previous prime is 55451533259. The next prime is 55451533339. The reversal of 55451533321 is 12333515455.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12333515455 = 5 ⋅2466703091.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55451533321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55451533021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83763315 + ... + 83763976.

It is an arithmetic number, because the mean of its divisors is an integer number (13904765236).

Almost surely, 2^55451533321 is an apocalyptic number.

It is an amenable number.

55451533321 is a deficient number, since it is larger than the sum of its proper divisors (167527623).

55451533321 is a wasteful number, since it uses less digits than its factorization.

55451533321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167527622.

The product of its digits is 135000, while the sum is 37.

The spelling of 55451533321 in words is "fifty-five billion, four hundred fifty-one million, five hundred thirty-three thousand, three hundred twenty-one".