81228302 has 8 divisors (see below), whose sum is σ = 121884912. Its totient is φ = 40600000.

The previous prime is 81228293. The next prime is 81228313. The reversal of 81228302 is 20382218.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2927 + ... + 13077.

It is an arithmetic number, because the mean of its divisors is an integer number (15235614).

Almost surely, 2^81228302 is an apocalyptic number.

81228302 is a deficient number, since it is larger than the sum of its proper divisors (40656610).

81228302 is a wasteful number, since it uses less digits than its factorization.

81228302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14154.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 81228302 is about 9012.6745198082. The cubic root of 81228302 is about 433.0809940458.

The spelling of 81228302 in words is "eighty-one million, two hundred twenty-eight thousand, three hundred two".