81180050 has 24 divisors (see below), whose sum is σ = 172566336. Its totient is φ = 27833040.

The previous prime is 81180037. The next prime is 81180053. The reversal of 81180050 is 5008118.

It is a junction number, because it is equal to n+sod(n) for n = 81179998 and 81180025.

It is not an unprimeable number, because it can be changed into a prime (81180053) 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, 115622 + ... + 116321.

It is an arithmetic number, because the mean of its divisors is an integer number (7190264).

Almost surely, 2^81180050 is an apocalyptic number.

81180050 is an abundant number, since it is smaller than the sum of its proper divisors (91386286).

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

81180050 is a wasteful number, since it uses less digits than its factorization.

81180050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231962 (or 231957 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 81180050 is about 9009.9972253048. The cubic root of 81180050 is about 432.9952227781.

Adding to 81180050 its reverse (5008118), we get a palindrome (86188168).

The spelling of 81180050 in words is "eighty-one million, one hundred eighty thousand, fifty".