81941052 has 24 divisors (see below), whose sum is σ = 191506896. Its totient is φ = 27269248.

The previous prime is 81941047. The next prime is 81941081. The reversal of 81941052 is 25014918.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2608 + ... + 13064.

It is an arithmetic number, because the mean of its divisors is an integer number (7979454).

Almost surely, 2^81941052 is an apocalyptic number.

It is an amenable number.

81941052 is an abundant number, since it is smaller than the sum of its proper divisors (109565844).

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

81941052 is a wasteful number, since it uses less digits than its factorization.

81941052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11117 (or 11115 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 81941052 is about 9052.1296941659. The cubic root of 81941052 is about 434.3440185415.

The spelling of 81941052 in words is "eighty-one million, nine hundred forty-one thousand, fifty-two".