55905567 has 8 divisors (see below), whose sum is σ = 74634624. Its totient is φ = 37223448.

The previous prime is 55905559. The next prime is 55905587. The reversal of 55905567 is 76550955.

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

It is not a de Polignac number, because 55905567 - 2³ = 55905559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55905587) 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, 8853 + ... + 13790.

It is an arithmetic number, because the mean of its divisors is an integer number (9329328).

Almost surely, 2^55905567 is an apocalyptic number.

55905567 is a deficient number, since it is larger than the sum of its proper divisors (18729057).

55905567 is a wasteful number, since it uses less digits than its factorization.

55905567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23469.

The product of its (nonzero) digits is 236250, while the sum is 42.

The square root of 55905567 is about 7477.0025411257. The cubic root of 55905567 is about 382.3710633810.

The spelling of 55905567 in words is "fifty-five million, nine hundred five thousand, five hundred sixty-seven".