55513786 has 8 divisors (see below), whose sum is σ = 83731284. Its totient is φ = 27603360.

The previous prime is 55513781. The next prime is 55513793. The reversal of 55513786 is 68731555.

It can be written as a sum of positive squares in 2 ways, for example, as 55130625 + 383161 = 7425^2 + 619^2 .

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

It is not an unprimeable number, because it can be changed into a prime (55513781) 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, 76315 + ... + 77038.

Almost surely, 2^55513786 is an apocalyptic number.

55513786 is a deficient number, since it is larger than the sum of its proper divisors (28217498).

55513786 is a wasteful number, since it uses less digits than its factorization.

55513786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153536.

The product of its digits is 126000, while the sum is 40.

The square root of 55513786 is about 7450.7574111630. The cubic root of 55513786 is about 381.4757617980.

It can be divided in two parts, 555 and 13786, that added together give a palindrome (14341).

The spelling of 55513786 in words is "fifty-five million, five hundred thirteen thousand, seven hundred eighty-six".