81325474 has 16 divisors (see below), whose sum is σ = 123163776. Its totient is φ = 40273200.

The previous prime is 81325469. The next prime is 81325499. The reversal of 81325474 is 47452318.

It is a super-2 number, since 2×81325474² = 13227665442649352, which contains 22 as substring.

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, 122704 + ... + 123364.

It is an arithmetic number, because the mean of its divisors is an integer number (7697736).

Almost surely, 2^81325474 is an apocalyptic number.

81325474 is a deficient number, since it is larger than the sum of its proper divisors (41838302).

81325474 is a wasteful number, since it uses less digits than its factorization.

81325474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161.

The product of its digits is 26880, while the sum is 34.

The square root of 81325474 is about 9018.0637611407. The cubic root of 81325474 is about 433.2536209721.

The spelling of 81325474 in words is "eighty-one million, three hundred twenty-five thousand, four hundred seventy-four".