55620451 has 2 divisors, whose sum is σ = 55620452. Its totient is φ = 55620450.

The previous prime is 55620449. The next prime is 55620469. The reversal of 55620451 is 15402655.

55620451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55620451 - 2¹ = 55620449 is a prime.

Together with 55620449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55620401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27810225 + 27810226.

It is an arithmetic number, because the mean of its divisors is an integer number (27810226).

Almost surely, 2^55620451 is an apocalyptic number.

55620451 is a deficient number, since it is larger than the sum of its proper divisors (1).

55620451 is an equidigital number, since it uses as much as digits as its factorization.

55620451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 55620451 is about 7457.9119732000. The cubic root of 55620451 is about 381.7199298506.

The spelling of 55620451 in words is "fifty-five million, six hundred twenty thousand, four hundred fifty-one".