55513491 has 16 divisors (see below), whose sum is σ = 80872320. Its totient is φ = 33592320.

The previous prime is 55513463. The next prime is 55513499. The reversal of 55513491 is 19431555.

55513491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55513491 - 2⁹ = 55512979 is a prime.

It is a super-3 number, since 3×55513491³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (55513499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37320 + ... + 38778.

It is an arithmetic number, because the mean of its divisors is an integer number (5054520).

Almost surely, 2^55513491 is an apocalyptic number.

55513491 is a deficient number, since it is larger than the sum of its proper divisors (25358829).

55513491 is a wasteful number, since it uses less digits than its factorization.

55513491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626.

The product of its digits is 13500, while the sum is 33.

The square root of 55513491 is about 7450.7376144916. The cubic root of 55513491 is about 381.4750860767.

The spelling of 55513491 in words is "fifty-five million, five hundred thirteen thousand, four hundred ninety-one".