71631712 has 12 divisors (see below), whose sum is σ = 141024996. Its totient is φ = 35815840.

The previous prime is 71631701. The next prime is 71631719. The reversal of 71631712 is 21713617.

It is a super-2 number, since 2×71631712² = 10262204328101888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71631719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1119214 + ... + 1119277.

It is an arithmetic number, because the mean of its divisors is an integer number (11752083).

Almost surely, 2^71631712 is an apocalyptic number.

It is an amenable number.

71631712 is a deficient number, since it is larger than the sum of its proper divisors (69393284).

71631712 is a wasteful number, since it uses less digits than its factorization.

71631712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238501 (or 2238493 counting only the distinct ones).

The product of its digits is 1764, while the sum is 28.

The square root of 71631712 is about 8463.5519730194. The cubic root of 71631712 is about 415.3062277464.

The spelling of 71631712 in words is "seventy-one million, six hundred thirty-one thousand, seven hundred twelve".