55221646451 has 2 divisors, whose sum is σ = 55221646452. Its totient is φ = 55221646450.

The previous prime is 55221646429. The next prime is 55221646471. The reversal of 55221646451 is 15464612255.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55221646451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55221646399 and 55221646408.

It is not a weakly prime, because it can be changed into another prime (55221646411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27610823225 + 27610823226.

It is an arithmetic number, because the mean of its divisors is an integer number (27610823226).

Almost surely, 2^55221646451 is an apocalyptic number.

55221646451 is a deficient number, since it is larger than the sum of its proper divisors (1).

55221646451 is an equidigital number, since it uses as much as digits as its factorization.

55221646451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288000, while the sum is 41.

The spelling of 55221646451 in words is "fifty-five billion, two hundred twenty-one million, six hundred forty-six thousand, four hundred fifty-one".