55786281 has 16 divisors (see below), whose sum is σ = 76422528. Its totient is φ = 36176000.

The previous prime is 55786273. The next prime is 55786301. The reversal of 55786281 is 18268755.

It is a cyclic number.

It is not a de Polignac number, because 55786281 - 2³ = 55786273 is a prime.

It is a super-2 number, since 2×55786281² = 6224218295621922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55788281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79231 + ... + 79931.

It is an arithmetic number, because the mean of its divisors is an integer number (4776408).

Almost surely, 2^55786281 is an apocalyptic number.

It is an amenable number.

55786281 is a deficient number, since it is larger than the sum of its proper divisors (20636247).

55786281 is a wasteful number, since it uses less digits than its factorization.

55786281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392.

The product of its digits is 134400, while the sum is 42.

The square root of 55786281 is about 7469.0214218464. The cubic root of 55786281 is about 382.0989140159.

The spelling of 55786281 in words is "fifty-five million, seven hundred eighty-six thousand, two hundred eighty-one".