55340257 has 12 divisors (see below), whose sum is σ = 64496640. Its totient is φ = 47345256.

The previous prime is 55340251. The next prime is 55340267. The reversal of 55340257 is 75204355.

55340257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55340257 - 2³ = 55340249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55340251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50368 + ... + 51454.

It is an arithmetic number, because the mean of its divisors is an integer number (5374720).

Almost surely, 2^55340257 is an apocalyptic number.

It is an amenable number.

55340257 is a deficient number, since it is larger than the sum of its proper divisors (9156383).

55340257 is a wasteful number, since it uses less digits than its factorization.

55340257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140 (or 2133 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 31.

The square root of 55340257 is about 7439.1032389664. The cubic root of 55340257 is about 381.0778654264.

The spelling of 55340257 in words is "fifty-five million, three hundred forty thousand, two hundred fifty-seven".