81542162 has 12 divisors (see below), whose sum is σ = 132446250. Its totient is φ = 37634688.

The previous prime is 81542161. The next prime is 81542173. The reversal of 81542162 is 26124518.

It can be written as a sum of positive squares in 3 ways, for example, as 42367081 + 39175081 = 6509^2 + 6259^2 .

It is not an unprimeable number, because it can be changed into a prime (81542161) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 120287 + ... + 120962.

Almost surely, 2^81542162 is an apocalyptic number.

81542162 is a deficient number, since it is larger than the sum of its proper divisors (50904088).

81542162 is a wasteful number, since it uses less digits than its factorization.

81542162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241277 (or 241264 counting only the distinct ones).

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

The square root of 81542162 is about 9030.0698779135. The cubic root of 81542162 is about 433.6380745297.

The spelling of 81542162 in words is "eighty-one million, five hundred forty-two thousand, one hundred sixty-two".