81465122 has 16 divisors (see below), whose sum is σ = 136196640. Its totient is φ = 36318528.

The previous prime is 81465119. The next prime is 81465221. The reversal of 81465122 is 22156418.

It is a super-2 number, since 2×81465122² = 13273132204949768, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62408 + ... + 63699.

It is an arithmetic number, because the mean of its divisors is an integer number (8512290).

Almost surely, 2^81465122 is an apocalyptic number.

81465122 is a deficient number, since it is larger than the sum of its proper divisors (54731518).

81465122 is a wasteful number, since it uses less digits than its factorization.

81465122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126145.

The product of its digits is 3840, while the sum is 29.

The square root of 81465122 is about 9025.8031221604. The cubic root of 81465122 is about 433.5014662486.

The spelling of 81465122 in words is "eighty-one million, four hundred sixty-five thousand, one hundred twenty-two".