55511051 has 2 divisors, whose sum is σ = 55511052. Its totient is φ = 55511050.

The previous prime is 55511047. The next prime is 55511081. The reversal of 55511051 is 15011555.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55511051 - 2² = 55511047 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55511011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27755525 + 27755526.

It is an arithmetic number, because the mean of its divisors is an integer number (27755526).

Almost surely, 2^55511051 is an apocalyptic number.

55511051 is a deficient number, since it is larger than the sum of its proper divisors (1).

55511051 is an equidigital number, since it uses as much as digits as its factorization.

55511051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 625, while the sum is 23.

The square root of 55511051 is about 7450.5738705149. The cubic root of 55511051 is about 381.4694969677.

The spelling of 55511051 in words is "fifty-five million, five hundred eleven thousand, fifty-one".