55105457 has 12 divisors (see below), whose sum is σ = 60831540. Its totient is φ = 49880160.

The previous prime is 55105451. The next prime is 55105537. The reversal of 55105457 is 75450155.

It can be written as a sum of positive squares in 2 ways, for example, as 10962721 + 44142736 = 3311^2 + 6644^2 .

It is not a de Polignac number, because 55105457 - 2⁴ = 55105441 is a prime.

It is a super-2 number, since 2×55105457² = 6073222782357698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55105451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31703 + ... + 33395.

It is an arithmetic number, because the mean of its divisors is an integer number (5069295).

Almost surely, 2^55105457 is an apocalyptic number.

It is an amenable number.

55105457 is a deficient number, since it is larger than the sum of its proper divisors (5726083).

55105457 is a wasteful number, since it uses less digits than its factorization.

55105457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984 (or 1973 counting only the distinct ones).

The product of its (nonzero) digits is 17500, while the sum is 32.

The square root of 55105457 is about 7423.3049917136. The cubic root of 55105457 is about 380.5381502623.

The spelling of 55105457 in words is "fifty-five million, one hundred five thousand, four hundred fifty-seven".