51155633 has 2 divisors, whose sum is σ = 51155634. Its totient is φ = 51155632.

The previous prime is 51155617. The next prime is 51155641. The reversal of 51155633 is 33655115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40806544 + 10349089 = 6388^2 + 3217^2 .

It is a cyclic number.

It is not a de Polignac number, because 51155633 - 2⁴ = 51155617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51155596 and 51155605.

It is not a weakly prime, because it can be changed into another prime (51155683) 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, 25577816 + 25577817.

It is an arithmetic number, because the mean of its divisors is an integer number (25577817).

Almost surely, 2^51155633 is an apocalyptic number.

It is an amenable number.

51155633 is a deficient number, since it is larger than the sum of its proper divisors (1).

51155633 is an equidigital number, since it uses as much as digits as its factorization.

51155633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6750, while the sum is 29.

The square root of 51155633 is about 7152.3166177121. The cubic root of 51155633 is about 371.2198187287.

The spelling of 51155633 in words is "fifty-one million, one hundred fifty-five thousand, six hundred thirty-three".