97571538 has 24 divisors (see below), whose sum is σ = 211586700. Its totient is φ = 32495904.

The previous prime is 97571531. The next prime is 97571561. The reversal of 97571538 is 83517579.

It can be written as a sum of positive squares in 2 ways, for example, as 80407089 + 17164449 = 8967^2 + 4143^2 .

It is a junction number, because it is equal to n+sod(n) for n = 97571493 and 97571502.

It is not an unprimeable number, because it can be changed into a prime (97571531) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 39648 + ... + 42036.

Almost surely, 2^97571538 is an apocalyptic number.

97571538 is an abundant number, since it is smaller than the sum of its proper divisors (114015162).

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

97571538 is a wasteful number, since it uses less digits than its factorization.

97571538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4666 (or 4663 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The square root of 97571538 is about 9877.8306322795. The cubic root of 97571538 is about 460.3707439612.

The spelling of 97571538 in words is "ninety-seven million, five hundred seventy-one thousand, five hundred thirty-eight".