55054397 has 2 divisors, whose sum is σ = 55054398. Its totient is φ = 55054396.

The previous prime is 55054379. The next prime is 55054399. The reversal of 55054397 is 79345055.

It is a happy number.

Together with previous prime (55054379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54671236 + 383161 = 7394^2 + 619^2 .

It is a cyclic number.

It is not a de Polignac number, because 55054397 - 2⁸ = 55054141 is a prime.

Together with 55054399, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55054397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55054399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27527198 + 27527199.

It is an arithmetic number, because the mean of its divisors is an integer number (27527199).

Almost surely, 2^55054397 is an apocalyptic number.

It is an amenable number.

55054397 is a deficient number, since it is larger than the sum of its proper divisors (1).

55054397 is an equidigital number, since it uses as much as digits as its factorization.

55054397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94500, while the sum is 38.

The square root of 55054397 is about 7419.8650257265. The cubic root of 55054397 is about 380.4205800410.

The spelling of 55054397 in words is "fifty-five million, fifty-four thousand, three hundred ninety-seven".