55749471 has 8 divisors (see below), whose sum is σ = 75054720. Its totient is φ = 36805272.

The previous prime is 55749451. The next prime is 55749479. The reversal of 55749471 is 17494755.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-55749471 is a prime.

It is a super-3 number, since 3×55749471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55749479) 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, 89901 + ... + 90518.

It is an arithmetic number, because the mean of its divisors is an integer number (9381840).

Almost surely, 2^55749471 is an apocalyptic number.

55749471 is a deficient number, since it is larger than the sum of its proper divisors (19305249).

55749471 is a wasteful number, since it uses less digits than its factorization.

55749471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180525.

The product of its digits is 176400, while the sum is 42.

The square root of 55749471 is about 7466.5568369899. The cubic root of 55749471 is about 382.0148541870.

The spelling of 55749471 in words is "fifty-five million, seven hundred forty-nine thousand, four hundred seventy-one".