81214316 has 6 divisors (see below), whose sum is σ = 142125060. Its totient is φ = 40607156.

The previous prime is 81214307. The next prime is 81214333. The reversal of 81214316 is 61341218.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151786 + ... + 10151793.

It is an arithmetic number, because the mean of its divisors is an integer number (23687510).

Almost surely, 2^81214316 is an apocalyptic number.

It is an amenable number.

81214316 is a deficient number, since it is larger than the sum of its proper divisors (60910744).

81214316 is a wasteful number, since it uses less digits than its factorization.

81214316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20303583 (or 20303581 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 81214316 is about 9011.8985791009. The cubic root of 81214316 is about 433.0561364601.

The spelling of 81214316 in words is "eighty-one million, two hundred fourteen thousand, three hundred sixteen".