712315221 has 16 divisors (see below), whose sum is σ = 1012137984. Its totient is φ = 444563504.

The previous prime is 712315207. The next prime is 712315259. The reversal of 712315221 is 122513217.

It is not a de Polignac number, because 712315221 - 2⁵ = 712315189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 712315191 and 712315200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (719315221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106581 + ... + 113066.

It is an arithmetic number, because the mean of its divisors is an integer number (63258624).

Almost surely, 2^712315221 is an apocalyptic number.

It is an amenable number.

712315221 is a deficient number, since it is larger than the sum of its proper divisors (299822763).

712315221 is a wasteful number, since it uses less digits than its factorization.

712315221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219720.

The product of its digits is 840, while the sum is 24.

The square root of 712315221 is about 26689.2341778478. The cubic root of 712315221 is about 893.0807769605.

Adding to 712315221 its reverse (122513217), we get a palindrome (834828438).

The spelling of 712315221 in words is "seven hundred twelve million, three hundred fifteen thousand, two hundred twenty-one".