81413200 has 60 divisors (see below), whose sum is σ = 213388128. Its totient is φ = 29603200.

The previous prime is 81413191. The next prime is 81413203. The reversal of 81413200 is 231418.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81413203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4852 + ... + 13651.

Almost surely, 2^81413200 is an apocalyptic number.

81413200 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81413200 is an abundant number, since it is smaller than the sum of its proper divisors (131974928).

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

81413200 is a wasteful number, since it uses less digits than its factorization.

81413200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18532 (or 18521 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 81413200 is about 9022.9263545703. The cubic root of 81413200 is about 433.4093489262.

Adding to 81413200 its reverse (231418), we get a palindrome (81644618).

The spelling of 81413200 in words is "eighty-one million, four hundred thirteen thousand, two hundred".