55857567 has 32 divisors (see below), whose sum is σ = 80640000. Its totient is φ = 34312320.

The previous prime is 55857553. The next prime is 55857583. The reversal of 55857567 is 76575855.

It is not a de Polignac number, because 55857567 - 2⁴ = 55857551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55857167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 374809 + ... + 374957.

It is an arithmetic number, because the mean of its divisors is an integer number (2520000).

Almost surely, 2^55857567 is an apocalyptic number.

55857567 is a deficient number, since it is larger than the sum of its proper divisors (24782433).

55857567 is a wasteful number, since it uses less digits than its factorization.

55857567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351.

The product of its digits is 1470000, while the sum is 48.

The square root of 55857567 is about 7473.7920094153. The cubic root of 55857567 is about 382.2615986333.

The spelling of 55857567 in words is "fifty-five million, eight hundred fifty-seven thousand, five hundred sixty-seven".