81354752 has 28 divisors (see below), whose sum is σ = 162715956. Its totient is φ = 40673280.

The previous prime is 81354743. The next prime is 81354761. The reversal of 81354752 is 25745318.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (81354743) and next prime (81354761).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3227 + ... + 13157.

Almost surely, 2^81354752 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81354752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81357978).

81354752 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81354752 is an frugal number, since it uses more digits than its factorization.

81354752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9957 (or 9933 counting only the distinct ones).

The product of its digits is 33600, while the sum is 35.

The square root of 81354752 is about 9019.6869125264. The cubic root of 81354752 is about 433.3056066415.

The spelling of 81354752 in words is "eighty-one million, three hundred fifty-four thousand, seven hundred fifty-two".