81307062 has 24 divisors (see below), whose sum is σ = 176482800. Its totient is φ = 27053520.

The previous prime is 81307021. The next prime is 81307063. The reversal of 81307062 is 26070318.

It is a super-2 number, since 2×81307062² = 13221676662143688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81307063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7012 + ... + 14552.

It is an arithmetic number, because the mean of its divisors is an integer number (7353450).

Almost surely, 2^81307062 is an apocalyptic number.

81307062 is an abundant number, since it is smaller than the sum of its proper divisors (95175738).

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

81307062 is a wasteful number, since it uses less digits than its factorization.

81307062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8148 (or 8145 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 81307062 is about 9017.0428633782. The cubic root of 81307062 is about 433.2209224528.

The spelling of 81307062 in words is "eighty-one million, three hundred seven thousand, sixty-two".