55672557 has 4 divisors (see below), whose sum is σ = 74230080. Its totient is φ = 37115036.

The previous prime is 55672549. The next prime is 55672571. The reversal of 55672557 is 75527655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55672557 - 2³ = 55672549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55672537) 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 3 ways as a sum of consecutive naturals, for example, 9278757 + ... + 9278762.

It is an arithmetic number, because the mean of its divisors is an integer number (18557520).

Almost surely, 2^55672557 is an apocalyptic number.

It is an amenable number.

55672557 is a deficient number, since it is larger than the sum of its proper divisors (18557523).

55672557 is a wasteful number, since it uses less digits than its factorization.

55672557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18557522.

The product of its digits is 367500, while the sum is 42.

The square root of 55672557 is about 7461.4044924531. The cubic root of 55672557 is about 381.8390927993.

The spelling of 55672557 in words is "fifty-five million, six hundred seventy-two thousand, five hundred fifty-seven".