81254232 has 64 divisors (see below), whose sum is σ = 227772000. Its totient is φ = 26836992.

The previous prime is 81254231. The next prime is 81254267. The reversal of 81254232 is 23245218.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 81254196 and 81254205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81254231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22744 + ... + 26072.

Almost surely, 2^81254232 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 81254232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113886000).

81254232 is an abundant number, since it is smaller than the sum of its proper divisors (146517768).

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

81254232 is a wasteful number, since it uses less digits than its factorization.

81254232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3457 (or 3447 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 81254232 is about 9014.1129347263. The cubic root of 81254232 is about 433.1270723838.

The spelling of 81254232 in words is "eighty-one million, two hundred fifty-four thousand, two hundred thirty-two".