55533397 has 2 divisors, whose sum is σ = 55533398. Its totient is φ = 55533396.

The previous prime is 55533383. The next prime is 55533433. The reversal of 55533397 is 79333555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55487601 + 45796 = 7449^2 + 214^2 .

It is a cyclic number.

It is not a de Polignac number, because 55533397 - 2¹⁹ = 55009109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55533197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27766698 + 27766699.

It is an arithmetic number, because the mean of its divisors is an integer number (27766699).

Almost surely, 2^55533397 is an apocalyptic number.

It is an amenable number.

55533397 is a deficient number, since it is larger than the sum of its proper divisors (1).

55533397 is an equidigital number, since it uses as much as digits as its factorization.

55533397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 212625, while the sum is 40.

The square root of 55533397 is about 7452.0733356563. The cubic root of 55533397 is about 381.5206770100.

The spelling of 55533397 in words is "fifty-five million, five hundred thirty-three thousand, three hundred ninety-seven".