81023061 has 16 divisors (see below), whose sum is σ = 125794944. Its totient is φ = 45424704.

The previous prime is 81023053. The next prime is 81023077. The reversal of 81023061 is 16032018.

It is not a de Polignac number, because 81023061 - 2³ = 81023053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81023561) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 35286 + ... + 37511.

It is an arithmetic number, because the mean of its divisors is an integer number (7862184).

Almost surely, 2^81023061 is an apocalyptic number.

It is an amenable number.

81023061 is a deficient number, since it is larger than the sum of its proper divisors (44771883).

81023061 is a wasteful number, since it uses less digits than its factorization.

81023061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72860.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 81023061 is about 9001.2810754914. The cubic root of 81023061 is about 432.7159285755.

Adding to 81023061 its reverse (16032018), we get a palindrome (97055079).

It can be divided in two parts, 810 and 23061, that added together give a triangular number (23871 = T₂₁₈).

The spelling of 81023061 in words is "eighty-one million, twenty-three thousand, sixty-one".