55151566 has 16 divisors (see below), whose sum is σ = 87469200. Its totient is φ = 26008128.

The previous prime is 55151563. The next prime is 55151599. The reversal of 55151566 is 66515155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55151561) 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, 5740 + ... + 11968.

It is an arithmetic number, because the mean of its divisors is an integer number (5466825).

Almost surely, 2^55151566 is an apocalyptic number.

55151566 is a deficient number, since it is larger than the sum of its proper divisors (32317634).

55151566 is a wasteful number, since it uses less digits than its factorization.

55151566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6483.

The product of its digits is 22500, while the sum is 34.

The square root of 55151566 is about 7426.4100344648. The cubic root of 55151566 is about 380.6442579748.

The spelling of 55151566 in words is "fifty-five million, one hundred fifty-one thousand, five hundred sixty-six".