55497975 has 24 divisors (see below), whose sum is σ = 98816592. Its totient is φ = 27321600.

The previous prime is 55497971. The next prime is 55497989. The reversal of 55497975 is 57979455.

It is not a de Polignac number, because 55497975 - 2² = 55497971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55497971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27486 + ... + 29435.

It is an arithmetic number, because the mean of its divisors is an integer number (4117358).

Almost surely, 2^55497975 is an apocalyptic number.

55497975 is a deficient number, since it is larger than the sum of its proper divisors (43318617).

55497975 is a wasteful number, since it uses less digits than its factorization.

55497975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56947 (or 56942 counting only the distinct ones).

The product of its digits is 1984500, while the sum is 51.

The square root of 55497975 is about 7449.6963025348. The cubic root of 55497975 is about 381.4395420502.

The spelling of 55497975 in words is "fifty-five million, four hundred ninety-seven thousand, nine hundred seventy-five".