38523521 has 8 divisors (see below), whose sum is σ = 39095784. Its totient is φ = 37955200.

The previous prime is 38523517. The next prime is 38523523. The reversal of 38523521 is 12532583.

It can be written as a sum of positive squares in 4 ways, for example, as 1860496 + 36663025 = 1364^2 + 6055^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38523521 - 2² = 38523517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38523523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22715 + ... + 24351.

It is an arithmetic number, because the mean of its divisors is an integer number (4886973).

Almost surely, 2^38523521 is an apocalyptic number.

It is an amenable number.

38523521 is a deficient number, since it is larger than the sum of its proper divisors (572263).

38523521 is a wasteful number, since it uses less digits than its factorization.

38523521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971.

The product of its digits is 7200, while the sum is 29.

The square root of 38523521 is about 6206.7319097896. The cubic root of 38523521 is about 337.7344207689.

The spelling of 38523521 in words is "thirty-eight million, five hundred twenty-three thousand, five hundred twenty-one".