81056435 has 8 divisors (see below), whose sum is σ = 99337536. Its totient is φ = 63465280.

The previous prime is 81056429. The next prime is 81056441. The reversal of 81056435 is 53465018.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (81056429) and next prime (81056441).

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

It is not a de Polignac number, because 81056435 - 2¹² = 81052339 is a prime.

It is a Duffinian 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, 172226 + ... + 172695.

It is an arithmetic number, because the mean of its divisors is an integer number (12417192).

Almost surely, 2^81056435 is an apocalyptic number.

81056435 is a deficient number, since it is larger than the sum of its proper divisors (18281101).

81056435 is a wasteful number, since it uses less digits than its factorization.

81056435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344973.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 81056435 is about 9003.1347318587. The cubic root of 81056435 is about 432.7753333870.

The spelling of 81056435 in words is "eighty-one million, fifty-six thousand, four hundred thirty-five".