81233950 has 48 divisors (see below), whose sum is σ = 178274304. Its totient is φ = 26949600.

The previous prime is 81233941. The next prime is 81233969. The reversal of 81233950 is 5933218.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7107 + ... + 14593.

It is an arithmetic number, because the mean of its divisors is an integer number (3714048).

Almost surely, 2^81233950 is an apocalyptic number.

81233950 is an abundant number, since it is smaller than the sum of its proper divisors (97040354).

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

81233950 is a wasteful number, since it uses less digits than its factorization.

81233950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7537 (or 7532 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 81233950 is about 9012.9878508739. The cubic root of 81233950 is about 433.0910315357.

The spelling of 81233950 in words is "eighty-one million, two hundred thirty-three thousand, nine hundred fifty".