55120451 has 2 divisors, whose sum is σ = 55120452. Its totient is φ = 55120450.

The previous prime is 55120423. The next prime is 55120469. The reversal of 55120451 is 15402155.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55120451 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55122451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27560225 + 27560226.

It is an arithmetic number, because the mean of its divisors is an integer number (27560226).

Almost surely, 2^55120451 is an apocalyptic number.

55120451 is a deficient number, since it is larger than the sum of its proper divisors (1).

55120451 is an equidigital number, since it uses as much as digits as its factorization.

55120451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 55120451 is about 7424.3148505434. The cubic root of 55120451 is about 380.5726614941.

The spelling of 55120451 in words is "fifty-five million, one hundred twenty thousand, four hundred fifty-one".