81202361 has 8 divisors (see below), whose sum is σ = 85772544. Its totient is φ = 76754160.

The previous prime is 81202339. The next prime is 81202367. The reversal of 81202361 is 16320218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81202361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81202367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29126 + ... + 31791.

It is an arithmetic number, because the mean of its divisors is an integer number (10721568).

Almost surely, 2^81202361 is an apocalyptic number.

It is an amenable number.

81202361 is a deficient number, since it is larger than the sum of its proper divisors (4570183).

81202361 is a wasteful number, since it uses less digits than its factorization.

81202361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60991.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 81202361 is about 9011.2352649345. The cubic root of 81202361 is about 433.0348863471.

Adding to 81202361 its reverse (16320218), we get a palindrome (97522579).

The spelling of 81202361 in words is "eighty-one million, two hundred two thousand, three hundred sixty-one".