71011900 has 18 divisors (see below), whose sum is σ = 154096040. Its totient is φ = 28404720.

The previous prime is 71011883. The next prime is 71011901. The reversal of 71011900 is 911017.

It is a happy number.

It is a super-2 number, since 2×71011900² = 10085379883220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71011901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 354960 + ... + 355159.

Almost surely, 2^71011900 is an apocalyptic number.

It is an amenable number.

71011900 is an abundant number, since it is smaller than the sum of its proper divisors (83084140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71011900 is a wasteful number, since it uses less digits than its factorization.

71011900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710133 (or 710126 counting only the distinct ones).

The product of its (nonzero) digits is 63, while the sum is 19.

The square root of 71011900 is about 8426.8558786774. The cubic root of 71011900 is about 414.1049077960.

Adding to 71011900 its reverse (911017), we get a palindrome (71922917).

The spelling of 71011900 in words is "seventy-one million, eleven thousand, nine hundred".