55657311 has 8 divisors (see below), whose sum is σ = 74708400. Its totient is φ = 36855552.

The previous prime is 55657291. The next prime is 55657313. The reversal of 55657311 is 11375655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55657311 - 2⁵ = 55657279 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55657313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61810 + ... + 62703.

It is an arithmetic number, because the mean of its divisors is an integer number (9338550).

Almost surely, 2^55657311 is an apocalyptic number.

55657311 is a deficient number, since it is larger than the sum of its proper divisors (19051089).

55657311 is a wasteful number, since it uses less digits than its factorization.

55657311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124665.

The product of its digits is 15750, while the sum is 33.

The square root of 55657311 is about 7460.3827649793. The cubic root of 55657311 is about 381.8042339112.

The spelling of 55657311 in words is "fifty-five million, six hundred fifty-seven thousand, three hundred eleven".