671223217531 has 8 divisors (see below), whose sum is σ = 677943399024. Its totient is φ = 664504495200.

The previous prime is 671223217507. The next prime is 671223217537. The reversal of 671223217531 is 135712322176.

It is a happy number.

671223217531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 671223217531 - 2⁹ = 671223217019 is a prime.

It is a super-2 number, since 2×671223217531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671223217537) 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, 571801 + ... + 1292053.

It is an arithmetic number, because the mean of its divisors is an integer number (84742924878).

Almost surely, 2^671223217531 is an apocalyptic number.

671223217531 is a deficient number, since it is larger than the sum of its proper divisors (6720181493).

671223217531 is a wasteful number, since it uses less digits than its factorization.

671223217531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729581.

The product of its digits is 105840, while the sum is 40.

The spelling of 671223217531 in words is "six hundred seventy-one billion, two hundred twenty-three million, two hundred seventeen thousand, five hundred thirty-one".