55138033 has 2 divisors, whose sum is σ = 55138034. Its totient is φ = 55138032.

The previous prime is 55137991. The next prime is 55138051. The reversal of 55138033 is 33083155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38229489 + 16908544 = 6183^2 + 4112^2 .

It is a cyclic number.

It is not a de Polignac number, because 55138033 - 2²¹ = 53040881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55137992 and 55138010.

It is not a weakly prime, because it can be changed into another prime (55138093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27569016 + 27569017.

It is an arithmetic number, because the mean of its divisors is an integer number (27569017).

Almost surely, 2^55138033 is an apocalyptic number.

It is an amenable number.

55138033 is a deficient number, since it is larger than the sum of its proper divisors (1).

55138033 is an equidigital number, since it uses as much as digits as its factorization.

55138033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 55138033 is about 7425.4988384620. The cubic root of 55138033 is about 380.6131214752.

The spelling of 55138033 in words is "fifty-five million, one hundred thirty-eight thousand, thirty-three".