81314412 has 24 divisors (see below), whose sum is σ = 189938112. Its totient is φ = 27075600.

The previous prime is 81314411. The next prime is 81314459. The reversal of 81314412 is 21441318.

It is a super-2 number, since 2×81314412² = 13224067197811488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81314411) 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, 9987 + ... + 16197.

It is an arithmetic number, because the mean of its divisors is an integer number (7914088).

Almost surely, 2^81314412 is an apocalyptic number.

It is an amenable number.

81314412 is an abundant number, since it is smaller than the sum of its proper divisors (108623700).

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

81314412 is a wasteful number, since it uses less digits than its factorization.

81314412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7309 (or 7307 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

The square root of 81314412 is about 9017.4504157217. The cubic root of 81314412 is about 433.2339761686.

It can be divided in two parts, 813 and 14412, that added together give a triangular number (15225 = T₁₇₄).

The spelling of 81314412 in words is "eighty-one million, three hundred fourteen thousand, four hundred twelve".