81254031 has 8 divisors (see below), whose sum is σ = 108386304. Its totient is φ = 54145560.

The previous prime is 81254011. The next prime is 81254053. The reversal of 81254031 is 13045218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81254031 - 2⁷ = 81253903 is a prime.

It is a super-2 number, since 2×81254031² = 13204435107497922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81253992 and 81254010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81254011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4786 + ... + 13616.

It is an arithmetic number, because the mean of its divisors is an integer number (13548288).

Almost surely, 2^81254031 is an apocalyptic number.

81254031 is a deficient number, since it is larger than the sum of its proper divisors (27132273).

81254031 is a wasteful number, since it uses less digits than its factorization.

81254031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11901.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 81254031 is about 9014.1017855358. The cubic root of 81254031 is about 433.1267152388.

Adding to 81254031 its reverse (13045218), we get a palindrome (94299249).

The spelling of 81254031 in words is "eighty-one million, two hundred fifty-four thousand, thirty-one".