71573812 has 12 divisors (see below), whose sum is σ = 125911296. Its totient is φ = 35599160.

The previous prime is 71573807. The next prime is 71573819. The reversal of 71573812 is 21837517.

It is a super-2 number, since 2×71573812² = 10245621128422688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71573819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46078 + ... + 47605.

It is an arithmetic number, because the mean of its divisors is an integer number (10492608).

Almost surely, 2^71573812 is an apocalyptic number.

It is an amenable number.

71573812 is a deficient number, since it is larger than the sum of its proper divisors (54337484).

71573812 is a wasteful number, since it uses less digits than its factorization.

71573812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93878 (or 93876 counting only the distinct ones).

The product of its digits is 11760, while the sum is 34.

The square root of 71573812 is about 8460.1307318504. The cubic root of 71573812 is about 415.1943000741.

The spelling of 71573812 in words is "seventy-one million, five hundred seventy-three thousand, eight hundred twelve".