81036700 has 18 divisors (see below), whose sum is σ = 175849856. Its totient is φ = 32414640.

The previous prime is 81036689. The next prime is 81036737. The reversal of 81036700 is 763018.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 405084 + ... + 405283.

Almost surely, 2^81036700 is an apocalyptic number.

It is an amenable number.

81036700 is an abundant number, since it is smaller than the sum of its proper divisors (94813156).

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

81036700 is a wasteful number, since it uses less digits than its factorization.

81036700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810381 (or 810374 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 81036700 is about 9002.0386579930. The cubic root of 81036700 is about 432.7402075949.

Adding to 81036700 its reverse (763018), we get a palindrome (81799718).

The spelling of 81036700 in words is "eighty-one million, thirty-six thousand, seven hundred".