671131551 has 8 divisors (see below), whose sum is σ = 895796784. Its totient is φ = 446943680.

The previous prime is 671131519. The next prime is 671131579. The reversal of 671131551 is 155131176.

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

It is a cyclic number.

It is not a de Polignac number, because 671131551 - 2⁵ = 671131519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671135551) 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 7 ways as a sum of consecutive naturals, for example, 116046 + ... + 121691.

It is an arithmetic number, because the mean of its divisors is an integer number (111974598).

Almost surely, 2^671131551 is an apocalyptic number.

671131551 is a deficient number, since it is larger than the sum of its proper divisors (224665233).

671131551 is a wasteful number, since it uses less digits than its factorization.

671131551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238681.

The product of its digits is 3150, while the sum is 30.

The square root of 671131551 is about 25906.2068045478. The cubic root of 671131551 is about 875.5263449803.

The spelling of 671131551 in words is "six hundred seventy-one million, one hundred thirty-one thousand, five hundred fifty-one".