55442357 has 2 divisors, whose sum is σ = 55442358. Its totient is φ = 55442356.

The previous prime is 55442341. The next prime is 55442363. The reversal of 55442357 is 75324455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52911076 + 2531281 = 7274^2 + 1591^2 .

It is a cyclic number.

It is not a de Polignac number, because 55442357 - 2⁴ = 55442341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55442327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27721178 + 27721179.

It is an arithmetic number, because the mean of its divisors is an integer number (27721179).

Almost surely, 2^55442357 is an apocalyptic number.

It is an amenable number.

55442357 is a deficient number, since it is larger than the sum of its proper divisors (1).

55442357 is an equidigital number, since it uses as much as digits as its factorization.

55442357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84000, while the sum is 35.

The square root of 55442357 is about 7445.9624629728. The cubic root of 55442357 is about 381.3120779681.

The spelling of 55442357 in words is "fifty-five million, four hundred forty-two thousand, three hundred fifty-seven".