81375060 has 48 divisors (see below), whose sum is σ = 245379456. Its totient is φ = 20030592.

The previous prime is 81375059. The next prime is 81375061. The reversal of 81375060 is 6057318.

It is an interprime number because it is at equal distance from previous prime (81375059) and next prime (81375061).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81375061) 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, 51384 + ... + 52943.

It is an arithmetic number, because the mean of its divisors is an integer number (5112072).

Almost surely, 2^81375060 is an apocalyptic number.

It is an amenable number.

81375060 is an abundant number, since it is smaller than the sum of its proper divisors (164004396).

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

81375060 is a wasteful number, since it uses less digits than its factorization.

81375060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104352 (or 104350 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 81375060 is about 9020.8126019777. The cubic root of 81375060 is about 433.3416579597.

The spelling of 81375060 in words is "eighty-one million, three hundred seventy-five thousand, sixty".