55267787 has 4 divisors (see below), whose sum is σ = 55837656. Its totient is φ = 54697920.

The previous prime is 55267777. The next prime is 55267801. The reversal of 55267787 is 78776255.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55267787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55267717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284789 + ... + 284982.

It is an arithmetic number, because the mean of its divisors is an integer number (13959414).

Almost surely, 2^55267787 is an apocalyptic number.

55267787 is a deficient number, since it is larger than the sum of its proper divisors (569869).

55267787 is an equidigital number, since it uses as much as digits as its factorization.

55267787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569868.

The product of its digits is 823200, while the sum is 47.

The square root of 55267787 is about 7434.2307604755. The cubic root of 55267787 is about 380.9114478358.

The spelling of 55267787 in words is "fifty-five million, two hundred sixty-seven thousand, seven hundred eighty-seven".