81052480 has 56 divisors (see below), whose sum is σ = 203179680. Its totient is φ = 30712320.

The previous prime is 81052457. The next prime is 81052493. The reversal of 81052480 is 8425018.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

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, 586 + ... + 12745.

Almost surely, 2^81052480 is an apocalyptic number.

81052480 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81052480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101589840).

81052480 is an abundant number, since it is smaller than the sum of its proper divisors (122127200).

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

81052480 is a wasteful number, since it uses less digits than its factorization.

81052480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13367 (or 13357 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 81052480 is about 9002.9150834605. The cubic root of 81052480 is about 432.7682944465.

Adding to 81052480 its reverse (8425018), we get a palindrome (89477498).

It can be divided in two parts, 8105 and 2480, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 81052480 in words is "eighty-one million, fifty-two thousand, four hundred eighty".