81283350 has 24 divisors (see below), whose sum is σ = 201583080. Its totient is φ = 21675520.

The previous prime is 81283331. The next prime is 81283369. The reversal of 81283350 is 5338218.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (81283331) and next prime (81283369).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 270795 + ... + 271094.

It is an arithmetic number, because the mean of its divisors is an integer number (8399295).

Almost surely, 2^81283350 is an apocalyptic number.

81283350 is an abundant number, since it is smaller than the sum of its proper divisors (120299730).

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

81283350 is a wasteful number, since it uses less digits than its factorization.

81283350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541904 (or 541899 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 81283350 is about 9015.7279240226. The cubic root of 81283350 is about 433.1788042037.

The spelling of 81283350 in words is "eighty-one million, two hundred eighty-three thousand, three hundred fifty".