81326214 has 32 divisors (see below), whose sum is σ = 182060640. Its totient is φ = 26908416.

The previous prime is 81326209. The next prime is 81326227. The reversal of 81326214 is 41262318.

81326214 is a `hidden beast` number, since 8 + 1 + 32 + 621 + 4 = 666.

It is a super-2 number, since 2×81326214² = 13227906167147592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1902 + ... + 12894.

It is an arithmetic number, because the mean of its divisors is an integer number (5689395).

Almost surely, 2^81326214 is an apocalyptic number.

81326214 is an abundant number, since it is smaller than the sum of its proper divisors (100734426).

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

81326214 is a wasteful number, since it uses less digits than its factorization.

81326214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11141 (or 11135 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 81326214 is about 9018.1047898103. The cubic root of 81326214 is about 433.2549350610.

The spelling of 81326214 in words is "eighty-one million, three hundred twenty-six thousand, two hundred fourteen".