55155433 has 2 divisors, whose sum is σ = 55155434. Its totient is φ = 55155432.

The previous prime is 55155391. The next prime is 55155439. The reversal of 55155433 is 33455155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50083929 + 5071504 = 7077^2 + 2252^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55155433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55155395 and 55155404.

It is not a weakly prime, because it can be changed into another prime (55155439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27577716 + 27577717.

It is an arithmetic number, because the mean of its divisors is an integer number (27577717).

Almost surely, 2^55155433 is an apocalyptic number.

It is an amenable number.

55155433 is a deficient number, since it is larger than the sum of its proper divisors (1).

55155433 is an equidigital number, since it uses as much as digits as its factorization.

55155433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22500, while the sum is 31.

The square root of 55155433 is about 7426.6703844994. The cubic root of 55155433 is about 380.6531541679.

The spelling of 55155433 in words is "fifty-five million, one hundred fifty-five thousand, four hundred thirty-three".