55540775 has 6 divisors (see below), whose sum is σ = 68870592. Its totient is φ = 44432600.

The previous prime is 55540769. The next prime is 55540799. The reversal of 55540775 is 57704555.

It is not a de Polignac number, because 55540775 - 2⁸ = 55540519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1110791 + ... + 1110840.

It is an arithmetic number, because the mean of its divisors is an integer number (11478432).

Almost surely, 2^55540775 is an apocalyptic number.

55540775 is a deficient number, since it is larger than the sum of its proper divisors (13329817).

55540775 is a wasteful number, since it uses less digits than its factorization.

55540775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221641 (or 2221636 counting only the distinct ones).

The product of its (nonzero) digits is 122500, while the sum is 38.

The square root of 55540775 is about 7452.5683492337. The cubic root of 55540775 is about 381.5375721581.

The spelling of 55540775 in words is "fifty-five million, five hundred forty thousand, seven hundred seventy-five".