55388357 has 2 divisors, whose sum is σ = 55388358. Its totient is φ = 55388356.

The previous prime is 55388327. The next prime is 55388369. The reversal of 55388357 is 75388355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27867841 + 27520516 = 5279^2 + 5246^2 .

It is a cyclic number.

It is not a de Polignac number, because 55388357 - 2⁶ = 55388293 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55388317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27694178 + 27694179.

It is an arithmetic number, because the mean of its divisors is an integer number (27694179).

Almost surely, 2^55388357 is an apocalyptic number.

It is an amenable number.

55388357 is a deficient number, since it is larger than the sum of its proper divisors (1).

55388357 is an equidigital number, since it uses as much as digits as its factorization.

55388357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504000, while the sum is 44.

The square root of 55388357 is about 7442.3354533372. The cubic root of 55388357 is about 381.1882403946.

The spelling of 55388357 in words is "fifty-five million, three hundred eighty-eight thousand, three hundred fifty-seven".