81022047 has 8 divisors (see below), whose sum is σ = 108460800. Its totient is φ = 53799000.

The previous prime is 81022037. The next prime is 81022057. The reversal of 81022047 is 74022018.

It is an interprime number because it is at equal distance from previous prime (81022037) and next prime (81022057).

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

It is not a de Polignac number, because 81022047 - 2²³ = 72633439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81022037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53047 + ... + 54552.

It is an arithmetic number, because the mean of its divisors is an integer number (13557600).

Almost surely, 2^81022047 is an apocalyptic number.

81022047 is a deficient number, since it is larger than the sum of its proper divisors (27438753).

81022047 is a wasteful number, since it uses less digits than its factorization.

81022047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107853.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 81022047 is about 9001.2247499993. The cubic root of 81022047 is about 432.7141234278.

The spelling of 81022047 in words is "eighty-one million, twenty-two thousand, forty-seven".